PFS172 datasheet(13/92 Pages) PADAUK

13 / 92 page

PFS172

8bit MTP MCU with 8-bit ADC

Page 13 of 92

PDK-DS-PFS172-EN_V000-May 8, 2020

Pin Name

Pin Type &

Buffer Type

Description

PA5 /

PRSTB

ST /

CMOS

The functions of this pin can be:

(1) Bit 5 of port A. It can be configured as digital input, two-state output with pull-high

/ pull-low resistor by software independently.

(2) Hardware reset.

This pin can be used to wake-up system during sleep mode; however, wake-up

function is also disabled if bit 5 of padier register is “0”.

PA4 /

AD9 /

CIN+ /

CIN1- /

INT1

ST /

CMOS /

Analog

The functions of this pin can be:

(1) Bit 4 of port A. It can be configured as digital input, two-state output with pull-high

/ pull-low resistor by software independently.

(2) Channel 9 of ADC analog input.

(3) Plus input source of comparator

(4) Minus input source 1 of comparator

(5) External interrupt line 1. It can be used as an external interrupt line 1. Both rising

edge and falling edge are accepted to request interrupt service and configurable

by register setting.

When this pin is configured as analog input, please use bit 4 of register padier to

disable the digital input to prevent current leakage. The bit 4 of padier register can be

set to “0” to disable digital input; wake-up from power-down by toggling this pin is also

disabled.

PA3 /

AD8 /

CIN0- /

TM2PWM

ST /

CMOS /

Analog

The functions of this pin can be:

(1) Bit 3 of port A. It can be configured as digital input, two-state output with pull-high

/ pull-low resistor by software independently.

(2) Channel 8 of ADC analog input

(3) Minus input source 0 of comparator

(4) PWM output from Timer2

When this pin is configured as analog input, please use bit 3 of register padier to

disable the digital input to prevent current leakage. The bit 3 of padier register can be

set to “0” to disable digital input; wake-up from power-down by toggling this pin is also

disabled.

PA0 /

AD10 /

CO /

INT0

ST /

CMOS /

Analog

The functions of this pin can be:

(1) Bit 0 of port A. It can be configured as digital input, two-state output with pull-high

/ pull-low resistor by software independently.

(2) Channel 10 of ADC analog input

(3) Output of comparator

(4) External interrupt line 0. It can be used as an external interrupt line 0. Both rising

edge and falling edge are accepted to request interrupt service and configurable

by register setting.

When this pin is configured as analog input, please use bit 0 of register padier to

disable the digital input to prevent current leakage. The bit 0 of padier register can be

set to “0” to disable digital input; wake-up from power-down by toggling this pin is also

disabled.

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