Device Boot Modes; Master Subsystem Boot Mode Selection - Texas Instruments Concerto F28M36 Series Technical Reference Manual

Device Boot Modes

6.3 Device Boot Modes
This section explains the boot mode(s) supported on this device. As part of the master subsystem, M-Boot
ROM reads the boot mode GPIO on startup and boots the device accordingly.
mode GPIO configuration supported.
As will be explained in this chapter, C-Boot ROM also supports different boot modes which allow it to boot
from the control subsystem peripherals or boot-to-flash or boot-to-RAM. It is up to the master subsystem
application to start these boot mode(s) in C-Boot ROM using IPC commands.
Boot Mode #
0 Boot from Parallel GPIO
(2)
1 Boot to Master Subsystem RAM
(2)
Boot from Master Subsystem serial
2
(2)
peripherals (UART0/SSI0/I2C0)
3 Boot from Master Subsystem CAN interface
(2)
Boot from Master Subsystem Ethernet
4
(2)
interface
Not supported (Defaults to Boot-to-Flash),
5
(2)(4)
future boot from Cortex™-M3 USB
6 Boot-to-OTP
(2)(4)
7 Boot to Master Subsystem Flash memory
(2)(4)
8 Not supported (Defaults to Boot-to-Flash)
Boot from Master Subsystem serial
9
(4)
peripheral – SSI0 Master
Boot from Master Subsystem serial
10
(4)
peripheral – I2C0 Master
11 Not supported (Defaults to Boot-to-Flash)
(4)
Boot from Master Subsystem Ethernet
12
interface
13 Not supported (Defaults to Boot-to-Flash)
(4)
14 Not supported (Defaults to Boot-to-Flash)
(4)
15 Boot to Master Subsystem Flash memory
(4)
(1) By default, GPIO terminals are not pulled up (they are floating).
(2) Boot Modes 0–7 are pin-compatible with the F28M35x members of the Concerto family (they use same GPIO terminals).
(3) Boot Mode 12 is the same as Boot Mode 4, except it uses a different set of GPIO terminals.
(4) This Boot Mode uses a faster Flash power-up sequence. The maximum supported OSCCLK frequency for this mode is 30 MHz.
(5) Supported only in TMS version. On all other versions, this mode defaults to Boot-to-Flash.
It is advised that users should not use the unsupported boot mode configuration to let the device boot-to-
flash by default, in case TI adds new peripheral boot mode(s) in subsequent revisions of Boot ROM.
NOTE: PF2_GPIO34 is reserved to be used as one of the boot mode input GPIOs at power-up or
after reset. Users should take this into account when designing applications.
580
ROM Code and Peripheral Booting
Table 6-1. Master Subsystem Boot Mode Selection
Master Subsystem Boot Modes
Copyright © 2012–2019, Texas Instruments Incorporated
PF2_GPIO34 PF3_GPIO35
(Bmode_pin4) (Bmode_pin3)
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 1
1 1
1 1
1 1
SPRUHE8E – October 2012 – Revised November 2019
www.ti.com
Table 6-1 shows the boot
PG7_GPIO47 PG3_GPIO43
(Bmode_pin2) (Bmode_pin1)
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
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