ST7FLITE25 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7FLITE25

8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI

STMicroelectronics 

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ST7LITE2

I/O PORTS (Cont’d)

10.7 DEVICE-SPECIFIC I/O PORT CONFIGURATION

The I/O port register configurations are summa-

rised as follows.

Standard Ports

PA7:0, PB6:0

MODE

floating input

pull-up input

open drain output

push-pull output

DDR OR

0

0

0

1

1

0

1

1

Interrupt Ports

Ports where the external interrupt capability is

selected using the EISR register

MODE

floating input

pull-up interrupt input

open drain output

push-pull output

DDR OR

0

0

0

1

1

0

1

1

Table 10. Port Configuration (Standard ports)

Port

Port A

Port B

Pin name

PA7:0

PB6:0

OR = 0

floating

floating

Input

OR = 1

pull-up

pull-up

Output

OR = 0

open drain

open drain

OR = 1

push-pull

push-pull

Note: On ports where the external interrupt capability is selected using the EISR register, the configura-

tion will be as follows:

Port

Port A

Port B

Pin name

PA7:0

PB6:0

OR = 0

floating

floating

Input

OR = 1

pull-up interrupt

pull-up interrupt

Output

OR = 0

open drain

open drain

OR = 1

push-pull

push-pull

Table 11. I/O Port Register Map and Reset Values

Address

(Hex.)

Register

Label

7

6

5

4

3

2

1

0

PADR

MSB

LSB

0000h

Reset Value

1

1

1

1

1

1

1

1

PADDR

MSB

LSB

0001h

Reset Value

0

0

0

0

0

0

0

0

PAOR

MSB

LSB

0002h

Reset Value

0

1

0

0

0

0

0

0

PBDR

MSB

LSB

0003h

Reset Value

1

1

1

1

1

1

1

1

PBDDR

MSB

LSB

0004h

Reset Value

0

0

0

0

0

0

0

0

PBOR

MSB

LSB

0005h

Reset Value

0

0

0

0

0

0

0

0

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