PFS173 datasheet(13/105 Pages) PADAUK

13 / 105 page

PFS173

8bit MTP MCU with 8-bit ADC

Page 13 of 105

PDK-DS-PFS173-EN_V105-Jun. 19, 2020

Pin Name

Pin Type &

Buffer Type

Description

PA6 /

ST /

CMOS

The functions of this pin can be:

(1) Bit 6 of port A. It can be configured as digital input or two-state output, with

pull-high resistor.

(2) X2 is Crystal XOUT(X2) when crystal oscillator is used.

If this pin is used for crystal oscillator, bit 6 of padier register must be programmed “0”

to avoid leakage current. This pin can be used to wake-up system during sleep mode;

however, wake-up function is also disabled if bit 6 of padier register is “0”.

PA5 /

PRSTB /

PG2PWM

IO (OD)

ST /

CMOS

The functions of this pin can be:

(1) Bit 5 of port A. It can be configured as digital input or open-drain output , with

pull-high resistor.

(2) Hardware reset.

(3) Output of 11-bit PWM generator PWMG2

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”.

Please put 33Ω resistor in

series to have high noise immunity when this pin is in input mode.

PA4 /

AD9 /

CIN+ /

CIN1- /

INT1 /

PG1PWM

ST /

CMOS /

Analog

The functions of this pin can be:

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

pull-high resistor.

(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.

(6) Output of 11-bit PWM generator PWMG1

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 /

PG2PWM

ST /

CMOS /

Analog

The functions of this pin can be:

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

pull-high resistor.

(2) Channel 8 of ADC analog input

(3) Minus input source 0 of comparator

(4) PWM output from Timer2

(5) Output of 11-bit PWM generator PWMG2

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.

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