ST72511R datasheet(42/164 Pages) STMICROELECTRONICS

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ST72311R, ST72511R, ST72512R, ST72532R

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I/O PORTS (Cont’d)

8.4 LOW POWER MODES

8.5 INTERRUPTS

The external interrupt event generates an interrupt

if the corresponding configuration is selected with

DDR and OR registers and the interrupt mask in

the CC register is not active (RIM instruction).

Table 11. Port Configuration

* Note: when the CANTX alternate function is selected the IO port operates in output push-pull mode.

Mode

Description

WAIT

No effect on I/O ports. External interrupts

cause the device to exit from WAIT mode.

HALT

No effect on I/O ports. External interrupts

cause the device to exit from HALT mode.

Interrupt Event

Event

Flag

Enable

Control

Bit

Exit

from

Wait

Exit

from

Halt

External interrupt on

selected external

event

DDRx

ORx

Yes

Port

Pin name

Input

Outpu t

OR = 0

OR = 1

OR = 0

OR = 1

High-Sink

Port A

PA7:6

floating

true open-drain

Yes

PA5:4

floating

pull-up

open drain

push-pull

PA3

floating

floating interrupt

open drain

push-pull

PA2:0

floating

pull-up interrupt

open drain

push-pull

Port B

PB4, PB3

floating

floating interrupt

open drain

push-pull

PB7:5, PB2:0

floating

pull-up interrupt

open drain

push-pull

Port C

PC7:0

floating

pull-up

open drain

push-pull

PC3:2 only

Port D

PD7:0

floating

pull-up

open drain

push-pull

Port E

PE7:3, PE1:0

floating

pull-up

open drain

push-pull

PE7:4 only

PE2

pull-up input only *

Port F

PF7:3

floating

pull-up

open drain

push-pull

PF7:6 only

PF2

floating

floating interrupt

open drain

push-pull

PF1:0

floating

pull-up interrupt

open drain

push-pull

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