ST7DALIF2 datasheet(67/171 Pages) STMICROELECTRONICS

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ST7DALIF2

I/O ports

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12.7

Device-specific I/O port configuration

The I/O port register configurations are summarized as follows.

Table 29.

Ports PA7:0, PB6:0 with interrupt capability not selected in EISR register

Mode

DDR

floating input

pull-up input

open drain output

push-pull output

Table 30.

Ports PA7:0, PB6:0 with interrupt capability selected in EISR register

Mode

DDR

Floating input

Pull-up interrupt input

Open drain output

Push-pull output

Table 31.

Port configuration (interrupt capability not selected in the EISR register)

Port

Pin name

Input

Output

OR = 0

OR = 1

OR = 0

OR = 1

Port A

PA7:0

floating

pull-up

open drain

push-pull

Port B

PB6:0

floating

pull-up

open drain

push-pull

Table 32.

Port configuration (interrupt capability selected in the EISR register)

Port

Pin name

Input

Output

OR = 0

OR = 1

OR = 0

OR = 1

Port A

PA7:0

floating

pull-up interrupt

open drain

push-pull

Port B

PB6:0

floating

pull-up interrupt

open drain

push-pull

Table 33.

I/O port register map and reset values

Address

(Hex.)

label

76543210

0000h

PADR

Reset

Value

MSB

1111111

LSB

0001h

PADDR

Reset

Value

MSB

0000000

LSB

0002h

PAOR

Reset

Value

MSB

0100000

LSB

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