ST72325S6B5(2007) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72325S6B5
(Rev.:2007)

8-bit MCU with 16 to 60K Flash/ROM, ADC, CSS, 5 timers, SPI, SCI, I2C interface

STMicroelectronics 

I/O PORTS (Cont’d)

9.5.1 I/O Port Implementation

The I/O port register configurations are summa-

rised as follows.

Standard Ports

PA5:4, PC7:0, PD7:0, PE7:3,

PE1:0, PF7:3,

MODE

floating input

pull-up input

open drain output

push-pull output

DDR OR

0

0

0

1

1

0

1

1

Interrupt Ports

PA2:0, PB6:5, PB4, PB2:0, PF1:0 (with pull-up)

MODE

floating input

pull-up interrupt input

open drain output

push-pull output

DDR OR

0

0

0

1

1

0

1

1

MODE

floating input

floating interrupt input

open drain output

push-pull output

True Open Drain Ports

PA7:6

MODE

floating input

open drain (high sink ports)

Pull-Up Input Port PE2

MODE

pull-up input

open drain output*

push-pull output*

DDR OR

0

0

0

1

1

0

1

1

DDR

0

1

DDR OR

0

x

1

0

1

1

Table 13. Port Configuration

Port

Pin name

Port A

Port B

Port C

Port D

Port E

Port F

PA7:6

PA5:4

PA3

PA2:0

PB7, PB3

PB6:5, PB4,

PB2:0

PC7:0

PD7:0

PE7:3, PE1:0

PE2

PF7:3

PF2

PF1:0

*Pull-up always activated on PE2.

OR = 0

floating

floating

floating

floating

Input

OR = 1

floating

pull-up

floating interrupt

pull-up interrupt

floating interrupt

floating

pull-up interrupt

floating

pull-up

floating

pull-up

floating

pull-up

pull-up input only

floating

pull-up

floating

floating interrupt

floating

pull-up interrupt

Output

OR = 0

OR = 1

true open-drain

open drain

push-pull

open drain

push-pull

open drain

push-pull

open drain

push-pull

open drain

push-pull

open drain

open drain

open drain

open drain*

open drain

open drain

open drain

push-pull

push-pull

push-pull

push-pull*

push-pull

push-pull

push-pull

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