Gpio34, Gpio199 Multiplexing Diagram - Texas Instruments Concerto F28M36 Series Technical Reference Manual

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0 = PU disabled (reset value)

1 = PU enabled

GPxDAT latch/read are accessed at the same memory location.

Pull-up selection is only controlled by the M3 GPIO registers except GPIO192-GPIO199, which is controlled by the

GPGPUD register.

GPIO32 - GPIO63 only.

Note the bit polarity difference between GPIOPUR and GPGPUD registers when enabling pullups.

Open drain selection is only controlled by the M3 GPIO registers

The appropriate bits in the GPIOCSEL registers (M3 GPIO registers) must be set to use the C28

GPIOs. If the GPIO is set as an M3 GPIO, the C28 GPIO MUX inputs are still active and can be read.

The input qualification circuit is not reset when modes are changed (such as changing from output to

SPRUHE8E – October 2012 – Revised November 2019

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Figure 4-37. GPIO34, GPIO199 Multiplexing Diagram

0 = input, 1 = output

C28 General-Purpose Input/Output (GPIO)

(default on reset)

General-Purpose Input/Output (GPIO)

GPxDAT (read)

(default on reset)

Peripheral 1 input

Peripheral 2 input

Peripheral 3 input

Peripheral 1 output

Peripheral 2 output

Peripheral 3 output

(default on reset)

Peripheral 1 output enable

Peripheral 2 output enable

Peripheral 3 output enable

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