GPT2

Instance: GPT2
Component: GPT
Base address: 0x40012000


General Purpose Timer.

TOP:GPT2 Register Summary

Register Name

Type

Register Width (Bits)

Register Reset

Address Offset

Physical Address

CFG

RW

32

0x0000 0000

0x0000 0000

0x4001 2000

TAMR

RW

32

0x0000 0000

0x0000 0004

0x4001 2004

TBMR

RW

32

0x0000 0000

0x0000 0008

0x4001 2008

CTL

RW

32

0x0000 0000

0x0000 000C

0x4001 200C

SYNC

RW

32

0x0000 0000

0x0000 0010

0x4001 2010

IMR

RW

32

0x0000 0000

0x0000 0018

0x4001 2018

RIS

RO

32

0x0000 0000

0x0000 001C

0x4001 201C

MIS

RO

32

0x0000 0000

0x0000 0020

0x4001 2020

ICLR

RW

32

0x0000 0000

0x0000 0024

0x4001 2024

TAILR

RW

32

0xFFFF FFFF

0x0000 0028

0x4001 2028

TBILR

RW

32

0x0000 FFFF

0x0000 002C

0x4001 202C

TAMATCHR

RW

32

0xFFFF FFFF

0x0000 0030

0x4001 2030

TBMATCHR

RW

32

0x0000 FFFF

0x0000 0034

0x4001 2034

TAPR

RW

32

0x0000 0000

0x0000 0038

0x4001 2038

TBPR

RW

32

0x0000 0000

0x0000 003C

0x4001 203C

TAPMR

RW

32

0x0000 0000

0x0000 0040

0x4001 2040

TBPMR

RW

32

0x0000 0000

0x0000 0044

0x4001 2044

TAR

RO

32

0xFFFF FFFF

0x0000 0048

0x4001 2048

TBR

RO

32

0x0000 FFFF

0x0000 004C

0x4001 204C

TAV

RW

32

0xFFFF FFFF

0x0000 0050

0x4001 2050

TBV

RW

32

0x0000 FFFF

0x0000 0054

0x4001 2054

TAPS

RO

32

0x0000 0000

0x0000 005C

0x4001 205C

TBPS

RO

32

0x0000 0000

0x0000 0060

0x4001 2060

TAPV

RO

32

0x0000 0000

0x0000 0064

0x4001 2064

TBPV

RO

32

0x0000 0000

0x0000 0068

0x4001 2068

DMAEV

RW

32

0x0000 0000

0x0000 006C

0x4001 206C

VERSION

RO

32

0x0000 0400

0x0000 0FB0

0x4001 2FB0

ANDCCP

RW

32

0x0000 0000

0x0000 0FB4

0x4001 2FB4

TOP:GPT2 Register Descriptions

TOP:GPT2:CFG

Address Offset 0x0000 0000
Physical Address 0x4001 2000 Instance 0x4001 2000
Description Configuration
Type RW
Bits Field Name Description Type Reset
31:3 RESERVED3 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b0 0000 0000 0000 0000 0000 0000 0000
2:0 CFG GPT Configuration
0x2- 0x3 - Reserved
0x5- 0x7 - Reserved
Value ENUM Name Description
0x0 32BIT_TIMER 32-bit timer configuration
0x4 16BIT_TIMER 16-bit timer configuration.
Configure for two 16-bit timers.
Also see TAMR.TAMR and TBMR.TBMR.
RW 0b000

TOP:GPT2:TAMR

Address Offset 0x0000 0004
Physical Address 0x4001 2004 Instance 0x4001 2004
Description Timer A Mode
Type RW
Bits Field Name Description Type Reset
31:16 RESERVED16 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x0000
15:13 TCACT Timer Compare Action Select
Value ENUM Name Description
0x0 DIS_CMP Disable compare operations
0x1 TOG_ON_TO Toggle State on Time-Out
0x2 CLR_ON_TO Clear CCP output pin on Time-Out
0x3 SET_ON_TO Set CCP output pin on Time-Out
0x4 SETTOG_ON_TO Set CCP output pin immediately and toggle on Time-Out
0x5 CLRTOG_ON_TO Clear CCP output pin immediately and toggle on Time-Out
0x6 SETCLR_ON_TO Set CCP output pin immediately and clear on Time-Out
0x7 CLRSET_ON_TO Clear CCP output pin immediately and set on Time-Out
RW 0b000
12 TACINTD One-Shot/Periodic Interrupt Disable
Value ENUM Name Description
0x0 EN_TO_INTR Time-out interrupt function as normal
0x1 DIS_TO_INTR Time-out interrupt are disabled
RW 0
11 TAPLO GPTM Timer A PWM Legacy Operation

0 Legacy operation with CCP pin driven Low when the TAILR
register is reloaded after the timer reaches 0.

1 CCP is driven High when the TAILR register is reloaded after the timer reaches 0.

This bit is only valid in PWM mode.
Value ENUM Name Description
0x0 LEGACY Legacy operation
0x1 CCP_ON_TO CCP output pin is set to 1 on time-out
RW 0
10 TAMRSU Timer A Match Register Update mode

This bit defines when the TAMATCHR and TAPR registers are updated.

If the timer is disabled (CTL.TAEN = 0) when this bit is set, TAMATCHR and TAPR are updated when the timer is enabled.
If the timer is stalled (CTL.TASTALL = 1) when this bit is set, TAMATCHR and TAPR are updated according to the configuration of this bit.
Value ENUM Name Description
0x0 CYCLEUPDATE Update TAMATCHR and TAPR, if used, on the next cycle.
0x1 TOUPDATE Update TAMATCHR and TAPR, if used, on the next time-out.
RW 0
9 TAPWMIE GPTM Timer A PWM Interrupt Enable
This bit enables interrupts in PWM mode on rising, falling, or both edges of the CCP output, as defined by the CTL.TAEVENT
In addition, when this bit is set and a capture event occurs, Timer A
automatically generates triggers to the DMA if the trigger capability is enabled by setting the CTL.TAOTE bit and the DMAEV.CAEDMAEN bit respectively.

0 Capture event interrupt is disabled.
1 Capture event interrupt is enabled.
This bit is only valid in PWM mode.
Value ENUM Name Description
0x0 DIS Interrupt is disabled.
0x1 EN Interrupt is enabled. This bit is only valid in PWM mode.
RW 0
8 TAILD GPT Timer A PWM Interval Load Write
Value ENUM Name Description
0x0 CYCLEUPDATE Update the TAR register with the value in the TAILR register on the next clock cycle. If the pre-scaler is used, update the TAPS register with the value in the TAPR register on the next clock cycle.
0x1 TOUPDATE Update the TAR register with the value in the TAILR register on the next timeout. If the prescaler is used, update the TAPS register with the value in the TAPR register on the next timeout.
RW 0
7 TASNAPS GPT Timer A Snap-Shot Mode
Value ENUM Name Description
0x0 DIS Snap-shot mode is disabled.
0x1 EN If Timer A is configured in the periodic mode, the actual free-running value of Timer A is loaded at the time-out event into the GPT Timer A (TAR) register.
RW 0
6 TAWOT GPT Timer A Wait-On-Trigger
Value ENUM Name Description
0x0 NOWAIT Timer A begins counting as soon as it is enabled.
0x1 WAIT If Timer A is enabled (CTL.TAEN = 1), Timer A does not begin counting until it receives a trigger from the timer in the previous position in the daisy chain. This bit must be clear for GPT Module 0, Timer A. This function is valid for one-shot, periodic, and PWM modes
RW 0
5 TAMIE GPT Timer A Match Interrupt Enable
Value ENUM Name Description
0x0 DIS The match interrupt is disabled for match events. Additionally, output triggers on match events are prevented.
0x1 EN An interrupt is generated when the match value in TAMATCHR is reached in the one-shot and periodic modes.
RW 0
4 TACDIR GPT Timer A Count Direction
Value ENUM Name Description
0x0 DOWN The timer counts down.
0x1 UP The timer counts up. When counting up, the timer starts from a value of 0x0.
RW 0
3 TAAMS GPT Timer A Alternate Mode

Note: To enable PWM mode, you must also clear TACM and then configure TAMR field to 0x2.
Value ENUM Name Description
0x0 CAP_COMP Capture/Compare mode is enabled.
0x1 PWM PWM mode is enabled
RW 0
2 TACM GPT Timer A Capture Mode
Value ENUM Name Description
0x0 EDGCNT Edge-Count mode
0x1 EDGTIME Edge-Time mode
RW 0
1:0 TAMR GPT Timer A Mode

0x0 Reserved
0x1 One-Shot Timer mode
0x2 Periodic Timer mode
0x3 Capture mode
The Timer mode is based on the timer configuration defined by bits 2:0 in the CFG register
Value ENUM Name Description
0x1 ONE_SHOT One-Shot Timer mode
0x2 PERIODIC Periodic Timer mode
0x3 CAPTURE Capture mode
RW 0b00

TOP:GPT2:TBMR

Address Offset 0x0000 0008
Physical Address 0x4001 2008 Instance 0x4001 2008
Description Timer B Mode
Type RW
Bits Field Name Description Type Reset
31:16 RESERVED16 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x0000
15:13 TCACT Timer Compare Action Select
Value ENUM Name Description
0x0 DIS_CMP Disable compare operations
0x1 TOG_ON_TO Toggle State on Time-Out
0x2 CLR_ON_TO Clear CCP output pin on Time-Out
0x3 SET_ON_TO Set CCP output pin on Time-Out
0x4 SETTOG_ON_TO Set CCP output pin immediately and toggle on Time-Out
0x5 CLRTOG_ON_TO Clear CCP output pin immediately and toggle on Time-Out
0x6 SETCLR_ON_TO Set CCP output pin immediately and clear on Time-Out
0x7 CLRSET_ON_TO Clear CCP output pin immediately and set on Time-Out
RW 0b000
12 TBCINTD One-Shot/Periodic Interrupt Mode
Value ENUM Name Description
0x0 EN_TO_INTR Normal Time-Out Interrupt
0x1 DIS_TO_INTR Mask Time-Out Interrupt
RW 0
11 TBPLO GPTM Timer B PWM Legacy Operation

0 Legacy operation with CCP pin driven Low when the TBILR
register is reloaded after the timer reaches 0.

1 CCP is driven High when the TBILR register is reloaded after the timer reaches 0.

This bit is only valid in PWM mode.
Value ENUM Name Description
0x0 LEGACY Legacy operation
0x1 CCP_ON_TO CCP output pin is set to 1 on time-out
RW 0
10 TBMRSU Timer B Match Register Update mode

This bit defines when the TBMATCHR and TBPR registers are updated

If the timer is disabled (CTL.TBEN is clear) when this bit is set, TBMATCHR and TBPR are updated when the timer is enabled.
If the timer is stalled (CTL.TBSTALL is set) when this bit is set, TBMATCHR and TBPR are updated according to the configuration of this bit.
Value ENUM Name Description
0x0 CYCLEUPDATE Update TBMATCHR and TBPR, if used, on the next cycle.
0x1 TOUPDATE Update TBMATCHR and TBPR, if used, on the next time-out.
RW 0
9 TBPWMIE GPTM Timer B PWM Interrupt Enable
This bit enables interrupts in PWM mode on rising, falling, or both edges of the CCP output, as defined by the CTL.TBEVENT
In addition, when this bit is set and a capture event occurs, Timer A
automatically generates triggers to the DMA if the trigger capability is enabled by setting the CTL.TBOTE bit and the DMAEV.CBEDMAEN bit respectively.

0 Capture event interrupt is disabled.
1 Capture event interrupt is enabled.
This bit is only valid in PWM mode.
Value ENUM Name Description
0x0 DIS Interrupt is disabled.
0x1 EN Interrupt is enabled. This bit is only valid in PWM mode.
RW 0
8 TBILD GPT Timer B PWM Interval Load Write
Value ENUM Name Description
0x0 CYCLEUPDATE Update the TBR register with the value in the TBILR register on the next clock cycle. If the pre-scaler is used, update the TBPS register with the value in the TBPR register on the next clock cycle.
0x1 TOUPDATE Update the TBR register with the value in the TBILR register on the next timeout. If the prescaler is used, update the TBPS register with the value in the TBPR register on the next timeout.
RW 0
7 TBSNAPS GPT Timer B Snap-Shot Mode
Value ENUM Name Description
0x0 DIS Snap-shot mode is disabled.
0x1 EN If Timer B is configured in the periodic mode
RW 0
6 TBWOT GPT Timer B Wait-On-Trigger
Value ENUM Name Description
0x0 NOWAIT Timer B begins counting as soon as it is enabled.
0x1 WAIT If Timer B is enabled (CTL.TBEN is set), Timer B does not begin counting until it receives a trigger from the timer in the previous position in the daisy chain. This function is valid for one-shot, periodic, and PWM modes
RW 0
5 TBMIE GPT Timer B Match Interrupt Enable.
Value ENUM Name Description
0x0 DIS The match interrupt is disabled for match events. Additionally, output triggers on match events are prevented.
0x1 EN An interrupt is generated when the match value in the TBMATCHR register is reached in the one-shot and periodic modes.
RW 0
4 TBCDIR GPT Timer B Count Direction
Value ENUM Name Description
0x0 DOWN The timer counts down.
0x1 UP The timer counts up. When counting up, the timer starts from a value of 0x0.
RW 0
3 TBAMS GPT Timer B Alternate Mode

Note: To enable PWM mode, you must also clear TBCM bit and configure TBMR field to 0x2.
Value ENUM Name Description
0x0 CAP_COMP Capture/Compare mode is enabled.
0x1 PWM PWM mode is enabled
RW 0
2 TBCM GPT Timer B Capture Mode
Value ENUM Name Description
0x0 EDGCNT Edge-Count mode
0x1 EDGTIME Edge-Time mode
RW 0
1:0 TBMR GPT Timer B Mode

0x0 Reserved
0x1 One-Shot Timer mode
0x2 Periodic Timer mode
0x3 Capture mode
The Timer mode is based on the timer configuration defined by bits 2:0 in the CFG register
Value ENUM Name Description
0x1 ONE_SHOT One-Shot Timer mode
0x2 PERIODIC Periodic Timer mode
0x3 CAPTURE Capture mode
RW 0b00

TOP:GPT2:CTL

Address Offset 0x0000 000C
Physical Address 0x4001 200C Instance 0x4001 200C
Description Control
Type RW
Bits Field Name Description Type Reset
31:15 RESERVED15 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b0 0000 0000 0000 0000
14 TBPWML GPT Timer B PWM Output Level

0: Output is unaffected.
1: Output is inverted.
Value ENUM Name Description
0x0 NORMAL Not inverted
0x1 INVERTED Inverted
RW 0
13:12 RESERVED12 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RW 0b00
11:10 TBEVENT GPT Timer B Event Mode

The values in this register are defined as follows:
Value Description
0x0 Positive edge
0x1 Negative edge
0x2 Reserved
0x3 Both edges
Note: If PWM output inversion is enabled, edge detection interrupt
behavior is reversed. Thus, if a positive-edge interrupt trigger
has been set and the PWM inversion generates a postive
edge, no event-trigger interrupt asserts. Instead, the interrupt
is generated on the negative edge of the PWM signal.
Value ENUM Name Description
0x0 POS Positive edge
0x1 NEG Negative edge
0x3 BOTH Both edges
RW 0b00
9 TBSTALL GPT Timer B Stall Enable
Value ENUM Name Description
0x0 DIS Timer B continues counting while the processor is halted by the debugger.
0x1 EN Timer B freezes counting while the processor is halted by the debugger.
RW 0
8 TBEN GPT Timer B Enable
Value ENUM Name Description
0x0 DIS Timer B is disabled.
0x1 EN Timer B is enabled and begins counting or the capture logic is enabled based on CFG register.
RW 0
7 RESERVED7 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0
6 TAPWML GPT Timer A PWM Output Level
Value ENUM Name Description
0x0 NORMAL Not inverted
0x1 INVERTED Inverted
RW 0
5:4 RESERVED4 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RW 0b00
3:2 TAEVENT GPT Timer A Event Mode

The values in this register are defined as follows:
Value Description
0x0 Positive edge
0x1 Negative edge
0x2 Reserved
0x3 Both edges
Note: If PWM output inversion is enabled, edge detection interrupt
behavior is reversed. Thus, if a positive-edge interrupt trigger
has been set and the PWM inversion generates a postive
edge, no event-trigger interrupt asserts. Instead, the interrupt
is generated on the negative edge of the PWM signal.
Value ENUM Name Description
0x0 POS Positive edge
0x1 NEG Negative edge
0x3 BOTH Both edges
RW 0b00
1 TASTALL GPT Timer A Stall Enable
Value ENUM Name Description
0x0 DIS Timer A continues counting while the processor is halted by the debugger.
0x1 EN Timer A freezes counting while the processor is halted by the debugger.
RW 0
0 TAEN GPT Timer A Enable
Value ENUM Name Description
0x0 DIS Timer A is disabled.
0x1 EN Timer A is enabled and begins counting or the capture logic is enabled based on the CFG register.
RW 0

TOP:GPT2:SYNC

Address Offset 0x0000 0010
Physical Address 0x4001 2010 Instance 0x4001 2010
Description Synch Register
Type RW
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:6 SYNC3 Synchronize GPT Timer 3.
Value ENUM Name Description
0x0 NOSYNC No Sync. GPT3 is not affected.
0x1 TIMERA A timeout event for Timer A of GPT3 is triggered
0x2 TIMERB A timeout event for Timer B of GPT3 is triggered
0x3 BOTH A timeout event for both Timer A and Timer B of GPT3 is triggered
WO 0b00
5:4 SYNC2 Synchronize GPT Timer 2.
Value ENUM Name Description
0x0 NOSYNC No Sync. GPT2 is not affected.
0x1 TIMERA A timeout event for Timer A of GPT2 is triggered
0x2 TIMERB A timeout event for Timer B of GPT2 is triggered
0x3 BOTH A timeout event for both Timer A and Timer B of GPT2 is triggered
WO 0b00
3:2 SYNC1 Synchronize GPT Timer 1
Value ENUM Name Description
0x0 NOSYNC No Sync. GPT1 is not affected.
0x1 TIMERA A timeout event for Timer A of GPT1 is triggered
0x2 TIMERB A timeout event for Timer B of GPT1 is triggered
0x3 BOTH A timeout event for both Timer A and Timer B of GPT1 is triggered
WO 0b00
1:0 SYNC0 Synchronize GPT Timer 0
Value ENUM Name Description
0x0 NOSYNC No Sync. GPT0 is not affected.
0x1 TIMERA A timeout event for Timer A of GPT0 is triggered
0x2 TIMERB A timeout event for Timer B of GPT0 is triggered
0x3 BOTH A timeout event for both Timer A and Timer B of GPT0 is triggered
WO 0b00

TOP:GPT2:IMR

Address Offset 0x0000 0018
Physical Address 0x4001 2018 Instance 0x4001 2018
Description Interrupt Mask
This register is used to enable the interrupts.
Associated registers:
RIS, MIS, ICLR
Type RW
Bits Field Name Description Type Reset
31:14 RESERVED14 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00 0000 0000 0000 0000
13 DMABIM Enabling this bit will make the RIS.DMABRIS interrupt propagate to MIS.DMABMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
12 RESERVED12 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0
11 TBMIM Enabling this bit will make the RIS.TBMRIS interrupt propagate to MIS.TBMMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
10 CBEIM Enabling this bit will make the RIS.CBERIS interrupt propagate to MIS.CBEMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
9 CBMIM Enabling this bit will make the RIS.CBMRIS interrupt propagate to MIS.CBMMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
8 TBTOIM Enabling this bit will make the RIS.TBTORIS interrupt propagate to MIS.TBTOMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
7:6 RESERVED6 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00
5 DMAAIM Enabling this bit will make the RIS.DMAARIS interrupt propagate to MIS.DMAAMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
4 TAMIM Enabling this bit will make the RIS.TAMRIS interrupt propagate to MIS.TAMMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
3 RESERVED3 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RW 0
2 CAEIM Enabling this bit will make the RIS.CAERIS interrupt propagate to MIS.CAEMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
1 CAMIM Enabling this bit will make the RIS.CAMRIS interrupt propagate to MIS.CAMMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0
0 TATOIM Enabling this bit will make the RIS.TATORIS interrupt propagate to MIS.TATOMIS
Value ENUM Name Description
0x0 DIS Disable Interrupt
0x1 EN Enable Interrupt
RW 0

TOP:GPT2:RIS

Address Offset 0x0000 001C
Physical Address 0x4001 201C Instance 0x4001 201C
Description Raw Interrupt Status
Associated registers:
IMR, MIS, ICLR
Type RO
Bits Field Name Description Type Reset
31:14 RESERVED14 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00 0000 0000 0000 0000
13 DMABRIS GPT Timer B DMA Done Raw Interrupt Status

0: Transfer has not completed
1: Transfer has completed		 RO 0
12 RESERVED12 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0
11 TBMRIS GPT Timer B Match Raw Interrupt

0: The match value has not been reached
1: The match value is reached.

TBMR.TBMIE is set, and the match values in TBMATCHR and optionally TBPMR have been reached when configured in one-shot or periodic mode.		 RO 0
10 CBERIS GPT Timer B Capture Mode Event Raw Interrupt

0: The event has not occured.
1: The event has occured.

This interrupt asserts when the subtimer is configured in Input Edge-Time mode		 RO 0
9 CBMRIS GPT Timer B Capture Mode Match Raw Interrupt

0: The capture mode match for Timer B has not occurred.
1: A capture mode match has occurred for Timer B. This interrupt
asserts when the values in the TBR and TBPR
match the values in the TBMATCHR and TBPMR
when configured in Input Edge-Time mode.

This bit is cleared by writing a 1 to the ICLR.CBMCINT bit.		 RO 0
8 TBTORIS GPT Timer B Time-out Raw Interrupt

0: Timer B has not timed out
1: Timer B has timed out.

This interrupt is asserted when a one-shot or periodic mode timer reaches its count limit. The count limit is 0 or the value loaded into TBILR, depending on the count direction.		 RO 0
7:6 RESERVED6 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00
5 DMAARIS GPT Timer A DMA Done Raw Interrupt Status

0: Transfer has not completed
1: Transfer has completed		 RO 0
4 TAMRIS GPT Timer A Match Raw Interrupt

0: The match value has not been reached
1: The match value is reached.

TAMR.TAMIE is set, and the match values in TAMATCHR and optionally TAPMR have been reached when configured in one-shot or periodic mode.		 RO 0
3 RESERVED3 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0
2 CAERIS GPT Timer A Capture Mode Event Raw Interrupt

0: The event has not occured.
1: The event has occured.

This interrupt asserts when the subtimer is configured in Input Edge-Time mode		 RO 0
1 CAMRIS GPT Timer A Capture Mode Match Raw Interrupt

0: The capture mode match for Timer A has not occurred.
1: A capture mode match has occurred for Timer A. This interrupt
asserts when the values in the TAR and TAPR
match the values in the TAMATCHR and TAPMR
when configured in Input Edge-Time mode.

This bit is cleared by writing a 1 to the ICLR.CAMCINT bit.		 RO 0
0 TATORIS GPT Timer A Time-out Raw Interrupt

0: Timer A has not timed out
1: Timer A has timed out.

This interrupt is asserted when a one-shot or periodic mode timer reaches its count limit. The count limit is 0 or the value loaded into TAILR, depending on the count direction.		 RO 0

TOP:GPT2:MIS

Address Offset 0x0000 0020
Physical Address 0x4001 2020 Instance 0x4001 2020
Description Masked Interrupt Status
Values are result of bitwise AND operation between RIS and IMR
Assosciated clear register: ICLR
Type RO
Bits Field Name Description Type Reset
31:14 RESERVED14 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00 0000 0000 0000 0000
13 DMABMIS 0: No interrupt or interrupt not enabled
1: RIS.DMABRIS = 1 && IMR.DMABIM = 1		 RO 0
12 RESERVED12 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0
11 TBMMIS 0: No interrupt or interrupt not enabled
1: RIS.TBMRIS = 1 && IMR.TBMIM = 1		 RO 0
10 CBEMIS 0: No interrupt or interrupt not enabled
1: RIS.CBERIS = 1 && IMR.CBEIM = 1		 RO 0
9 CBMMIS 0: No interrupt or interrupt not enabled
1: RIS.CBMRIS = 1 && IMR.CBMIM = 1		 RO 0
8 TBTOMIS 0: No interrupt or interrupt not enabled
1: RIS.TBTORIS = 1 && IMR.TBTOIM = 1		 RO 0
7:6 RESERVED6 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00
5 DMAAMIS 0: No interrupt or interrupt not enabled
1: RIS.DMAARIS = 1 && IMR.DMAAIM = 1		 RO 0
4 TAMMIS 0: No interrupt or interrupt not enabled
1: RIS.TAMRIS = 1 && IMR.TAMIM = 1		 RO 0
3 RESERVED3 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0
2 CAEMIS 0: No interrupt or interrupt not enabled
1: RIS.CAERIS = 1 && IMR.CAEIM = 1		 RO 0
1 CAMMIS 0: No interrupt or interrupt not enabled
1: RIS.CAMRIS = 1 && IMR.CAMIM = 1		 RO 0
0 TATOMIS 0: No interrupt or interrupt not enabled
1: RIS.TATORIS = 1 && IMR.TATOIM = 1		 RO 0

TOP:GPT2:ICLR

Address Offset 0x0000 0024
Physical Address 0x4001 2024 Instance 0x4001 2024
Description Interrupt Clear
This register is used to clear status bits in the RIS and MIS registers
Type RW
Bits Field Name Description Type Reset
31:14 RESERVED14 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00 0000 0000 0000 0000
13 DMABINT 0: Do nothing.
1: Clear RIS.DMABRIS and MIS.DMABMIS		 RW 0
12 RESERVED12 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RW 0
11 TBMCINT 0: Do nothing.
1: Clear RIS.TBMRIS and MIS.TBMMIS		 RW 0
10 CBECINT 0: Do nothing.
1: Clear RIS.CBERIS and MIS.CBEMIS		 RW 0
9 CBMCINT 0: Do nothing.
1: Clear RIS.CBMRIS and MIS.CBMMIS		 RW 0
8 TBTOCINT 0: Do nothing.
1: Clear RIS.TBTORIS and MIS.TBTOMIS		 RW 0
7:6 RESERVED6 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b00
5 DMAAINT 0: Do nothing.
1: Clear RIS.DMAARIS and MIS.DMAAMIS		 RW 0
4 TAMCINT 0: Do nothing.
1: Clear RIS.TAMRIS and MIS.TAMMIS		 RW 0
3 RESERVED3 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RW 0
2 CAECINT 0: Do nothing.
1: Clear RIS.CAERIS and MIS.CAEMIS		 RW 0
1 CAMCINT 0: Do nothing.
1: Clear RIS.CAMRIS and MIS.CAMMIS		 RW 0
0 TATOCINT 0: Do nothing.
1: Clear RIS.TATORIS and MIS.TATOMIS		 RW 0

TOP:GPT2:TAILR

Address Offset 0x0000 0028
Physical Address 0x4001 2028 Instance 0x4001 2028
Description Timer A Interval Load Register
Type RW
Bits Field Name Description Type Reset
31:0 TAILR GPT Timer A Interval Load Register

Writing this field loads the counter for Timer A. A read returns the current value of TAILR.		 RW 0xFFFF FFFF

TOP:GPT2:TBILR

Address Offset 0x0000 002C
Physical Address 0x4001 202C Instance 0x4001 202C
Description Timer B Interval Load Register
Type RW
Bits Field Name Description Type Reset
31:0 TBILR GPT Timer B Interval Load Register

Writing this field loads the counter for Timer B. A read returns the current value of TBILR.		 RW 0x0000 FFFF

TOP:GPT2:TAMATCHR

Address Offset 0x0000 0030
Physical Address 0x4001 2030 Instance 0x4001 2030
Description Timer A Match Register

Interrupts can be generated when the timer value is equal to the value in this register in one-shot or periodic mode.

In Edge-Count mode, this register along with TAILR, determines how many edge events are counted.
The total number of edge events counted is equal to the value in TAILR minus this value.

Note that in edge-count mode, when executing an up-count, the value of TAPR and TAILR must be greater than the value of TAPMR and this register.

In PWM mode, this value along with TAILR, determines the duty cycle of the output PWM signal.

When a 16/32-bit GPT is configured to one of the 32-bit modes, TAMATCHR appears as a 32-bit register. (The upper 16-bits correspond to the contents TBMATCHR).

In a 16-bit mode, the upper 16 bits of this register read as 0s and have no effect on the state of TBMATCHR.

Note : This register is updated internally (takes effect) based on TAMR.TAMRSU
Type RW
Bits Field Name Description Type Reset
31:0 TAMATCHR GPT Timer A Match Register RW 0xFFFF FFFF

TOP:GPT2:TBMATCHR

Address Offset 0x0000 0034
Physical Address 0x4001 2034 Instance 0x4001 2034
Description Timer B Match Register

When a GPT is configured to one of the 32-bit modes, the contents of bits 15:0 in this register are loaded into the upper 16 bits of TAMATCHR.
Reads from this register return the current match value of Timer B and writes are ignored.
In a 16-bit mode, bits 15:0 are used for the match value. Bits 31:16 are reserved in both cases.

Note : This register is updated internally (takes effect) based on TBMR.TBMRSU
Type RW
Bits Field Name Description Type Reset
31:16 RESERVED16 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x0000
15:0 TBMATCHR GPT Timer B Match Register RW 0xFFFF

TOP:GPT2:TAPR

Address Offset 0x0000 0038
Physical Address 0x4001 2038 Instance 0x4001 2038
Description Timer A Pre-scale
This register allows software to extend the range of the timers when they are used individually.
When in one-shot or periodic down count modes, this register acts as a true prescaler for the timer counter.
When acting as a true prescaler, the prescaler counts down to 0 before the value in TAR and TAV registers are incremented.
In all other individual/split modes, this register is a linear extension of the upper range of the timer counter, holding bits 23:16 in the 16-bit modes of the 16/32-bit GPT.
Type RW
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 TAPSR Timer A Pre-scale.

Prescaler ratio in one-shot and periodic count mode is TAPSR + 1, that is:

0: Prescaler ratio = 1
1: Prescaler ratio = 2
2: Prescaler ratio = 3
...
255: Prescaler ratio = 256		 RW 0x00

TOP:GPT2:TBPR

Address Offset 0x0000 003C
Physical Address 0x4001 203C Instance 0x4001 203C
Description Timer B Pre-scale
This register allows software to extend the range of the timers when they are used individually.
When in one-shot or periodic down count modes, this register acts as a true prescaler for the timer counter.
When acting as a true prescaler, the prescaler counts down to 0 before the value in TBR and TBV registers are incremented.
In all other individual/split modes, this register is a linear extension of the upper range of the timer counter, holding bits 23:16 in the 16-bit modes of the 16/32-bit GPT.
Type RW
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 TBPSR Timer B Pre-scale.

Prescale ratio in one-shot and periodic count mode is TBPSR + 1, that is:

0: Prescaler ratio = 1
1: Prescaler ratio = 2
2: Prescaler ratio = 3
...
255: Prescaler ratio = 256		 RW 0x00

TOP:GPT2:TAPMR

Address Offset 0x0000 0040
Physical Address 0x4001 2040 Instance 0x4001 2040
Description Timer A Pre-scale Match
This register allows software to extend the range of the TAMATCHR when used individually.
Type RW
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 TAPSMR GPT Timer A Pre-scale Match. In 16 bit mode this field holds bits 23 to 16. RW 0x00

TOP:GPT2:TBPMR

Address Offset 0x0000 0044
Physical Address 0x4001 2044 Instance 0x4001 2044
Description Timer B Pre-scale Match
This register allows software to extend the range of the TBMATCHR when used individually.
Type RW
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 TBPSMR GPT Timer B Pre-scale Match Register. In 16 bit mode this field holds bits 23 to 16. RW 0x00

TOP:GPT2:TAR

Address Offset 0x0000 0048
Physical Address 0x4001 2048 Instance 0x4001 2048
Description Timer A Register
This register shows the current value of the Timer A counter in all cases except for Input Edge Count and Time modes. In the Input Edge Count mode, this register contains the number of edges that
have occurred. In the Input Edge Time mode, this register contains the time at which the last edge event took place.

When a GPT is configured to one of the 32-bit modes, this register appears as a 32-bit register (the upper 16-bits correspond to the contents of the Timer B (TBR) register). In
the16-bit Input Edge Count, Input Edge Time, and PWM modes, bits 15:0 contain the value of the counter and bits 23:16 contain the value of the prescaler, which is the upper 8 bits of the count. Bits
31:24 always read as 0. To read the value of the prescaler in 16-bit One-Shot and Periodic modes, read bits [23:16] in the TAV register. To read the value of the prescalar in periodic snapshot
mode, read the Timer A Prescale Snapshot (TAPS) register.
Type RO
Bits Field Name Description Type Reset
31:0 TAR GPT Timer A Register

Based on the value in the register field TAMR.TAILD, this register is updated with the value from TAILR register either on the next cycle or on the next timeout.

A read returns the current value of the Timer A Count Register, in all cases except for Input Edge count and Timer modes.
In the Input Edge Count Mode, this register contains the number of edges that have occurred. In the Input Edge Time mode, this register contains the time at which the last edge event took place.		 RO 0xFFFF FFFF

TOP:GPT2:TBR

Address Offset 0x0000 004C
Physical Address 0x4001 204C Instance 0x4001 204C
Description Timer B Register
This register shows the current value of the Timer B counter in all cases except for Input Edge Count and Time modes. In the Input Edge Count mode, this register contains the number of edges that
have occurred. In the Input Edge Time mode, this register contains the time at which the last edge event took place.

When a GPTM is configured to one of the 32-bit modes, the contents of bits 15:0 in this register are loaded into the upper 16 bits of the TAR register. Reads from this register return the current
value of Timer B. In a 16-bit mode, bits 15:0 contain the value of the counter and bits 23:16 contain the value of the prescaler in Input Edge Count, Input Edge Time, and PWM modes, which is the
upper 8 bits of the count. Bits 31:24 always read as 0. To read the value of the prescaler in 16-bit One-Shot and Periodic modes, read bits [23:16] in the TBV register. To read the value of the
prescalar in periodic snapshot mode, read the Timer B Prescale Snapshot (TBPS) register.
Type RO
Bits Field Name Description Type Reset
31:0 TBR GPT Timer B Register

Based on the value in the register field TBMR.TBILD, this register is updated with the value from TBILR register either on the next cycle or on the next timeout.

A read returns the current value of the Timer B Count Register, in all cases except for Input Edge count and Timer modes.
In the Input Edge Count Mode, this register contains the number of edges that have occurred. In the Input Edge Time mode, this register contains the time at which the last edge event took place.		 RO 0x0000 FFFF

TOP:GPT2:TAV

Address Offset 0x0000 0050
Physical Address 0x4001 2050 Instance 0x4001 2050
Description Timer A Value
When read, this register shows the current, free-running value of Timer A in all modes. Softwarecan use this value to determine the time elapsed between an interrupt and the ISR entry when using
the snapshot feature with the periodic operating mode. When written, the value written into this register is loaded into the TAR register on the next clock cycle.

When a 16/32-bit GPTM is configured to one of the 32-bit modes, this register appears as a 32-bit register (the upper 16-bits correspond to the contents of the GPTM Timer B Value (TBV) register). In a 16-bit mode, bits 15:0 contain the value of the counter and bits 23:16 contain the current, free-running value of the prescaler, which is the upper 8 bits of the count in Input Edge Count, Input Edge Time, PWM and one-shot or periodic up count modes. In one-shot or periodic
down count modes, the prescaler stored in 23:16 is a true prescaler, meaning bits 23:16 count down before decrementing the value in bits 15:0. The prescaler in bits 31:24 always reads as 0.
Type RW
Bits Field Name Description Type Reset
31:0 TAV GPT Timer A Register
A read returns the current, free-running value of Timer A in all modes.
When written, the value written into this register is loaded into the
TAR register on the next clock cycle.
Note: In 16-bit mode, only the lower 16-bits of this
register can be written with a new value. Writes to the prescaler bits have no effect		 RW 0xFFFF FFFF

TOP:GPT2:TBV

Address Offset 0x0000 0054
Physical Address 0x4001 2054 Instance 0x4001 2054
Description Timer B Value
When read, this register shows the current, free-running value of Timer B in all modes. Software can use this value to determine the time elapsed between an interrupt and the ISR entry. When
written, the value written into this register is loaded into the TBR register on the next clock cycle.

When a 16/32-bit GPTM is configured to one of the 32-bit modes, the contents of bits 15:0 in this register are loaded into the upper 16 bits of the TAV register. Reads from this register return
the current free-running value of Timer B. In a 16-bit mode, bits 15:0 contain the value of the counter and bits 23:16 contain the current, free-running value of the prescaler, which is the upper 8 bits of
the count in Input Edge Count, Input Edge Time, PWM and one-shot or periodic up count modes.
In one-shot or periodic down count modes, the prescaler stored in 23:16 is a true prescaler, meaning bits 23:16 count down before decrementing the value in bits 15:0. The prescaler in bits 31:24 always reads as 0.
Type RW
Bits Field Name Description Type Reset
31:0 TBV GPT Timer B Register
A read returns the current, free-running value of Timer B in all modes.
When written, the value written into this register is loaded into the
TBR register on the next clock cycle.
Note: In 16-bit mode, only the lower 16-bits of this
register can be written with a new value. Writes to the prescaler bits have no effect		 RW 0x0000 FFFF

TOP:GPT2:TAPS

Address Offset 0x0000 005C
Physical Address 0x4001 205C Instance 0x4001 205C
Description Timer A Pre-scale Snap-shot

Based on the value in the register field TAMR.TAILD, this register is updated with the value from TAPR register either on the next cycle or on the next timeout.


This register shows the current value of the Timer A pre-scaler in the 16-bit mode.
Type RO
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 PSS GPT Timer A Pre-scaler RO 0x00

TOP:GPT2:TBPS

Address Offset 0x0000 0060
Physical Address 0x4001 2060 Instance 0x4001 2060
Description Timer B Pre-scale Snap-shot

Based on the value in the register field TBMR.TBILD, this register is updated with the value from TBPR register either on the next cycle or on the next timeout.

This register shows the current value of the Timer B pre-scaler in the 16-bit mode.
Type RO
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 PSS GPT Timer B Pre-scaler RO 0x00

TOP:GPT2:TAPV

Address Offset 0x0000 0064
Physical Address 0x4001 2064 Instance 0x4001 2064
Description Timer A Pre-scale Value
This register shows the current value of the Timer A free running pre-scaler in the 16-bit mode.
Type RO
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 PSV GPT Timer A Pre-scaler Value RO 0x00

TOP:GPT2:TBPV

Address Offset 0x0000 0068
Physical Address 0x4001 2068 Instance 0x4001 2068
Description Timer B Pre-scale Value
This register shows the current value of the Timer B free running pre-scaler in the 16-bit mode.
Type RO
Bits Field Name Description Type Reset
31:8 RESERVED8 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0x00 0000
7:0 PSV GPT Timer B Pre-scaler Value RO 0x00

TOP:GPT2:DMAEV

Address Offset 0x0000 006C
Physical Address 0x4001 206C Instance 0x4001 206C
Description DMA Event
This register allows software to enable/disable GPT DMA trigger events.
Type RW
Bits Field Name Description Type Reset
31:12 RESERVED12 Software should not rely on the value of a reserved field. Writing any other value may result in undefined behavior. RO 0x0 0000
11 TBMDMAEN GPT Timer B Match DMA Trigger Enable RW 0
10 CBEDMAEN GPT Timer B Capture Event DMA Trigger Enable RW 0
9 CBMDMAEN GPT Timer B Capture Match DMA Trigger Enable RW 0
8 TBTODMAEN GPT Timer B Time-Out DMA Trigger Enable RW 0
7:5 RESERVED5 Software should not rely on the value of a reserved field. Writing any other value may result in undefined behavior. RW 0b000
4 TAMDMAEN GPT Timer A Match DMA Trigger Enable RW 0
3 RESERVED3 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RW 0
2 CAEDMAEN GPT Timer A Capture Event DMA Trigger Enable RW 0
1 CAMDMAEN GPT Timer A Capture Match DMA Trigger Enable RW 0
0 TATODMAEN GPT Timer A Time-Out DMA Trigger Enable RW 0

TOP:GPT2:VERSION

Address Offset 0x0000 0FB0
Physical Address 0x4001 2FB0 Instance 0x4001 2FB0
Description Peripheral Version
This register provides information regarding the GPT version
Type RO
Bits Field Name Description Type Reset
31:0 VERSION Timer Revision. RO 0x0000 0400

TOP:GPT2:ANDCCP

Address Offset 0x0000 0FB4
Physical Address 0x4001 2FB4 Instance 0x4001 2FB4
Description Combined CCP Output
This register is used to logically AND CCP output pairs for each timer
Type RW
Bits Field Name Description Type Reset
31:1 RESERVED1 Software should not rely on the value of a reserved. Writing any other value than the reset value may result in undefined behavior. RO 0b000 0000 0000 0000 0000 0000 0000 0000
0 CCP_AND_EN Enables AND operation of the CCP outputs for timers A and B.

0 : PWM outputs of Timer A and Timer B are the internal generated PWM signals of the respective timers.
1 : PWM output of Timer A is ANDed version of Timer A and Timer B PWM signals and Timer B PWM ouput is Timer B PWM signal only.		 RW 0


© 2015 - 2016. Texas Instruments | All Rights Reserved