Introduction

This datasheet provides the performance numbers of various device drivers in MCU PLUS SDK for AM62DX

Generic Setup details

SOC Details	Values
Core	R5F
Core Operating Speed	800 MHz
Cache Status	Enabled

Optimization Details	Values
Build Profile	Release
R5F Compiler flags	-mcpu=cortex-r5 -mfloat-abi=hard -mfpu=vfpv3-d16 -Wall -Werror -g -mthumb -Wno-gnu-variable-sized-type-not-at-end -Wno-unused-function
R5F Linker flags	-Wl,–diag_suppress=10063 -Wl,–ram_model -Wl,–reread_libs
Code Placement	HSM RAM (For SBL Stage1), DDR (SBL Stage2 and others)
Data Placement	HSM RAM (For SBL Stage1), DDR (SBL Stage2 and others)

Performance Numbers

SBL OSPI performance (HS-FS)

• Software/Application used : sbl_ospi_multistage, ipc_rpmsg_echo, and HSM App Images
• Cores booted by stage1 SBL : r5f0-0
• Cores booted by stage2 SBL : hsm-m4f0-0 mcu-r5f0-0 a530-0 c75ss0
• Size of images loaded by stage1 : 259 KB
• Size of images loaded by stage2 : 267 KB
• Boot Media Clock : 166.667 MHz
• Mode : PHY enabled, DMA enabled
• Protocol : 8D-8D-8D

SBL Stage1 boot time breakdown	Time (ms)
SBL Stage1: System_init	17.538
SBL Stage1: Board_init	0.000
SBL Stage1: Drivers_open	0.001
SBL Stage1: SBL Drivers_open	0.192
SBL Stage1: Board_driversOpen	0.007
SBL Stage1: SBL Board_driversOpen	1.414
SBL Stage1: Sciclient Get Version	10.170
SBL Stage1: App_loadSelfcoreImage	4.998
SBL Stage1: App_waitForMcuPbist	0.003
-------------------------------------—	-----------—
SBL Stage2: Total time taken	34.327

SBL Stage2 boot time breakdown	Time (ms)
SBL Stage2: System_init	1.921
SBL Stage2: Board_init	0.003
SBL Stage2: FreeRtosTask Create	0.299
SBL Stage2: SBL Drivers_open	0.748
SBL Stage2: SBL Board_driversOpen	0.200
SBL Stage2: App_loadHSMImage	3.230
SBL Stage2: App_loadMCUImage	4.513
SBL Stage2: App_loadA53Images	6.095
SBL Stage2: App_loadDSPImage	15.422
-------------------------------------—	-----------—
SBL Stage2: SBL Total Time Taken	32.435

• Here the CPU load or section copy takes place from the OSPI memory to DDR, this would be slower that mem to mem copy.
• The time taken for Sciclient Get Version can be avoided if the version check is disabled
• Out of the ~17 ms taken for System Init is mostly attributed to DDR initialization.

SBL EMMC performance (HS-FS)

• Software/Application used : sbl_emmc_multistage, ipc_rpmsg_echo and HSM App Images
• Cores booted by stage1 SBL : r5f0-0
• Cores booted by stage2 SBL : hsm-m4f0-0 mcu-r5f0-0 r5f0-0 a530-0 c75ss0
• Size of images loaded by stage1 : 259 KB
• Size of images loaded by stage2 : 267 KB
• Boot Media Clock : 200.000 MHz
• Mode : HS200

SBL Stage1 boot time breakdown	Time (ms)
SBL Stage1: System_init	17.521
SBL Stage1: Board_init	0.000
SBL Stage1: Drivers_open	0.000
SBL Stage1: SBL Drivers_open	20.630
SBL Stage1: Board_driversOpen	0.000
SBL Stage1: Sciclient Get Version	10.181
SBL Stage1: App_loadSelfcoreImage	9.809
-------------------------------------—	-----------—
SBL Stage1: SBL Total Time Taken	58.143

SBL Stage2 boot time breakdown	Time (ms)
SBL Stage2: System_init	1.916
SBL Stage2: Board_init	. 3
SBL Stage2: FreeRtosTask Create	.255
SBL Stage2: SBL Drivers_open	16.666
SBL Stage2: App_loadHSMImage	6.313
SBL Stage2: App_loadMCUImage	6.037
SBL Stage2: App_loadA53Images	6.579
SBL Stage2: App_loadDSPImage	13.922
-------------------------------------—	-----------—
SBL Stage2: SBL Total Time Taken	51.694

• The emmc driver initialization is done as part of Drivers_open.
• Out of the ~17 ms taken for System Init is mostly attributed to DDR initialization.

IPC performance

IPC NOTIFY

• 10000 messages are sent and average one way message latency is measured.
• All cores are running from DDR with the exception of MCU-R5 from MSRAM

Local Core	Remote Core	Average Message Latency (ns)
mcu-r5f0-0	c75ss0	1956ns
mcu-r5f0-0	a530-0	1221ns
mcu-r5f0-0	r5f0-0	1840ns
a530-0	c75ss0	1956ns
c75ss0	r5f0-0	1956ns
a530-0	r5f0-0	1060ns

IPC RPMSG

• 1000 messages are sent and average one way message latency is measured

Local Core	Remote Core	Message Size	Average Message Latency (us)	Max Latency (us)
r5f0-0	a530-0	4	7.219	10
r5f0-0	mcu-r5f0-0	4	9.130	12
r5f0-0	c75ss0	4	76.210	89
r5f0-0	a530-0	32	9.809	12
r5f0-0	a530-0	64	12.874	16
r5f0-0	a530-0	112	17.838	21
r5f0-0	mcu-r5f0-0	32	15.146	18
r5f0-0	mcu-r5f0-0	64	21.922	26
r5f0-0	mcu-r5f0-0	112	32.056	37
r5f0-0	c75ss0	32	85.545	99
r5f0-0	c75ss0	64	95.048	121
r5f0-0	c75ss0	112	106.842	136

EMMC Performance

Mode	Data size(MiB)	Write speed(MiBps)	Read speed(MiBps)
SDR50	1	26.72	45.17
SDR50	4	38.03	45.56
SDR50	6	41.64	45.58
SDR50	32	39.27	45.62
SDR50	40	39.95	44.25
DDR50	1	54.18	82.00
DDR50	4	70.68	83.66
DDR50	6	59.78	79.37
DDR50	32	68.17	83.02
DDR50	40	63.71	83.17
HS200	1	71.61	160.23
HS200	4	109.75	169.47
HS200	6	109.49	152.14
HS200	32	95.56	166.77
HS200	40	99.37	167.39

OSPI Performance

• Flash frequency: 25Mhz
• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• Phy Condition: disabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.44	2.74
5	No	0.43	2.74
10	No	0.43	2.74
1	Yes	0.44	48.74
5	Yes	0.43	48.76
10	Yes	0.43	48.76

• Flash frequency: 50Mhz
• Flash protocol: FLASH_CFG_PROTO_1S_1S_1S
• Phy Condition: disabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.41	5.87
5	No	0.41	5.87
10	No	0.41	5.87
1	Yes	0.41	6.23
5	Yes	0.41	6.23
10	Yes	0.41	6.23

• Flash frequency: 133Mhz
• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• Phy Condition: enabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.43	6.14
5	No	0.43	6.13
10	No	0.43	6.13
1	Yes	0.43	233.99
5	Yes	0.43	234.69
10	Yes	0.43	234.78

• Flash frequency: 166Mhz
• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• Phy Condition: enabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.43	6.83
5	No	0.43	6.83
10	No	0.43	6.83
1	Yes	0.43	283.82
5	Yes	0.43	284.83
10	Yes	0.43	284.95

McASP (audio) Latency

• McASP operating at 48KHz, I2C mode
• RX to TX pin to pin latency is measured
• Rx To Tx pin to pin latency ~468us

Boot latency

• Measured from MCU_PORz to the first response of MCU-R5 and C7x cores
• OSPI boot mode with SBL running OSPI in 8D-8D-8D mode (Phy enabled, DMA enabled)
• HSM image size ~7KB
• MCU R5 image size ~1MB
• Boot time as observed in HS-FS device

MCU R5 boot time

• GPIO toggle time from MCUR5 main (Measured from MCU_PORz)
  • 112 ms

C7x audio chime time

• C7x audio out time (Measured from MCU_PORz)
• Includes DAC configuration time
  • 185 ms