M-Boot Rom Flow Diagram - Texas Instruments Concerto F28M35 Series Technical Reference Manual

M-Boot ROM Description
Configure
M3SSDIVSEL and
SYSDIVSEL to /1
Boot Mode
GPIO == FAST BOOT TO FLASH
MODE
Yes
Configure Flash for
faster power up
Branch to TO OTP
HWBIST Reset
Handler
Go to APP
550
ROM Code and Peripheral Booting
Figure 6-3. M-Boot ROM Flow Diagram
POR/BOR/
XRSn
M3 NMI
watch dog
RST
XRSn or POR
POR
RAM_INIT all M3
RAM(s)
M3 HWBIST
RESET
POR/XRSn
Clear Reset Cause Register
bits for PORn and XRSn
appropriately
Copyright © 2012–2019, Texas Instruments Incorporated
M3
M3 SW
HWBIST
reset/m3
reset
Debugger
reset
M-BootROM start
(NVIC initialized), Disable
watchDog, PLL and
sys_Ctrl init
Reset Cause
Not XRSn and Not POR
M3 DCSM INIT
M3 OTP device
configuration sequence
Reset Cause NOT POR
Adjust stack pointer to
C2 RAM
Enable NMI
Reset Cause
Any other kind of reset
Bring control system out of
reset
Bring Analog system/CIB
out of reset
M_M3_1
SPRUH22I – April 2012 – Revised November 2019
www.ti.com
M3 watch
Dog reset
ZERO out BootROM
Reserved C2 RAM
C-BootROM
A-BootROM
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