C-Boot Rom Gpio Assignments For Boot Modes - Texas Instruments Concerto F28M35 Series Technical Reference Manual

www.ti.com
Table 6-20. C-Boot ROM GPIO Assignments for Boot Modes
C-Boot ROM Peripheral
Boot Mode interface
SCI SCIA
I2C I2CA
SPI SPIA
Parallel Boot GPIO (s)
Mode
6.6.7 C-Boot ROM Clock Initializations
On these devices, M-Boot ROM configures the clock settings before bringing the control subsystem out of
reset. C-Boot ROM doesn't configure any clock settings.
Please refer to Section 6.5.8
for more details.
6.6.8 C-Boot ROM Functional Flow
As shown in the CPU vector table, InitBoot is the main function called whenever C-Boot ROM is executed
after a reset. This section explains the flow of C-Boot ROM function-by-function.
6.6.8.1 INITBOOT ()
• Initialize the stack pointer
• Put CPU in C28x Object Mode
• If POR is the source of reset, initialize M0, M1, L0-L3 and CTOM MSGRAM to 0x0
SPRUH22I – April 2012 – Revised November 2019
Submit Documentation Feedback
Boot Function Direction
Name for pin
SCITXDA Output
SCIRXDA Input
SDAA Bi-Directional
SCLA Output
SPISIMOA Output
SPISOMIA Input
SPICLKA Output
SPISTEA Output
D0 Input
D1 Input
D2 Input
D3 Input
D4 Input
D5 Input
D6 Input
D7 Input
HOST_CTRL Input
DSP_CTRL Ouput
and the Clock Control section of the System Control and Interrupts chapter
Copyright © 2012–2019, Texas Instruments Incorporated
GPIO(s) used Pin Mux Assignment
Peripheral Mode
PF3_GPIO35 1
PF4_GPIO36 1
PF0_GPIO32 1
PF1_GPIO33 1
PD0_GPIO16 1
PD1_GPIO17 1
PD2_GPIO18 1
PD3_GPIO19 1
PA0_GPIO0 0(default)
PA1_GPIO1 0(default)
PA2_GPIO2 0(default)
PA3_GPIO3 0(default)
PA4_GPIO4 0(default)
PA5_GPIO5 0(default)
PB0_GPIO8 0(default)
PB1_GPIO9 0(default)
PE3_GPIO27 0(default)
PE2_GPIO26 0(default)
ROM Code and Peripheral Booting
C-Boot ROM Description
Core Select
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
Control
Subsystem
581