Texas Instruments TMS320F2837 D Series

General Purpose Digital I/O
5 - 14 TMS320F2837xD Microcontroller Workshop - System Initialization
00 = sync to SYSCLKOUT only *
01 = qual to 3 samples
10 = qual to 6 samples
11 = no sync or qual (for peripheral only; GPIO same as 00)
00h no qualification (SYNC to SYSCLKOUT) *
01h QUALPRD = SYSCLKOUT/2
02h QUALPRD = SYSCLKOUT/4
… … …
FFh QUALPRD = SYSCLKOUT/510
F28x7x GPIO Input Qual Registers
GpioCtrlRegs.register (lab file: Gpio.c)
GPxQSEL1 / GPxQSEL2 where x = A, B, C, D, E or F
16 pins configured per register
0
31
QUALPRD0QUALPRD1QUALPRD2QUALPRD3
GPxCTRL where x = A, B, C, D, E or F
31 24 16 8 0
A: GPIO31-24 GPIO23-16 GPIO15-8 GPIO7-0
B: GPIO63-56 GPIO55-48 GPIO47-40 GPIO39-32
C: GPIO95-88 GPIO87-80 GPIO79-72 GPIO71-64
D: GPIO127-120 GPIO119-112 GPIO111-104 GPIO103-96
E: GPIO159-152 GPIO151-144 GPIO143-136 GPIO135-128
F: GPIO191-184 GPIO183-176 GPIO175-168 GPIO167-160
* reset default
F28x7xD Dual-Core GPIO Core Select
GpioCtrlRegs.register (lab file: Gpio.c)

Selects which core’s GPIODAT/SET/CLEAR/TOGGLE
registers are used to control a pin
 Each pin individually controlled
xx00 pin controlled by CPU1 *
xx01 pin controlled by CPU1.CLA1
xx10 pin controlled by CPU2
xx11 pin controlled by CPU2.CLA1
A: GPIO31-24 GPIO23-16 GPIO15-8 GPIO7-0
B: GPIO63-56 GPIO55-48 GPIO47-40 GPIO39-32
C: GPIO95-88 GPIO87-80 GPIO79-72 GPIO71-64
D: GPIO127-120 GPIO119-112 GPIO111-104 GPIO103-96
E: GPIO159-152 GPIO151-144 GPIO143-136 GPIO135-128
F: GPIO191-184 GPIO183-176 GPIO175-168 GPIO167-160
* reset default
GPxCSEL1
031
GPxCSEL3
031
GPxCSEL4
031
GPxCSEL2
031
Note: GPxLOCK register can be used to lock above registers (lock bit for each pin)