SN8F5708 datasheet(73/204 Pages) SONIX

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SN8F5708 Series

GPIO

Datasheet Rev. 2.4

12 GPIO

The microcontroller has up to 46 bidirectional general purpose I/O pin (GPIO). Unlike the original

8051 only has open-drain output, SN8F5708 builds in push-pull output structure to improve its

driving performance.

12.1

Input and Output Control

The input and output direction control is configurable through P0M to P5M registers. These bits

specify each pin that is either input mode or output mode.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

P0M

P07M

P06M

P05M

P04M

P03M

P02M

P01M

P00M

P1M

P17M

P16M

P15M

P14M

P13M

P12M

P11M

P10M

P2M

P27M

P26M

P25M

P24M

P23M

P22M

P21M

P20M

P3M

P37M

P36M

P35M

P34M

P33M

P32M

P31M

P30M

P4M

P47M

P46M

P45M

P44M

P43M

P42M

P41M

P40M

P5M

P55M

P54M

P53M

P52M

P51M

P50M

P1OC

PW3EN

PW2EN

PW1EN

P06OC

P05OC

P13OC

P12OC

P11OC

P0M: 0xF9, P1M: 0xFA, P2M: 0xFB, P3M: 0xFC, P4M: 0xFD, P5M: 0xFE

Bit

Field

Type

Initial

Description

P07M

R/W

Mode selection of P0.7

0: Input mode

1: Output mode

P06M

R/W

Mode selection of P0.6

0: Input mode

1: Output mode

P05M

R/W

Mode selection of P0.5

0: Input mode

1: Output mode

4..0

et cetera

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