PFS172 datasheet(15/92 Pages) PADAUK

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PFS172

8bit MTP MCU with 8-bit ADC

Page 15 of 92

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

Pin Name

Pin Type &

Buffer Type

Description

PB3 /

AD3

ST /

CMOS /

Analog

The functions of this pin can be:

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

/ pull-low resistor by software independently.

(2) Channel 3 of ADC analog input

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

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

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

also disabled.

PB2 /

AD2 /

TM2PWM

ST /

CMOS /

Analog

The functions of this pin can be:

(1) Bit 2 of port B. It can be configured as digital input, two-state output with pull-high

/ pull-low resistor by software independently.

(2) Channel 2 of ADC analog input

(3) PWM output from Timer2

When this pin is configured as analog input, please use bit 2 of register pbdier to

disable the digital input to prevent current leakage. The bit 2 of pbdier register can

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

also disabled.

PB1 /

AD1

ST /

CMOS /

Analog

The functions of this pin can be:

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

/ pull-low resistor by software independently.

(2) Channel 1 of ADC analog input

When this pin is configured as analog input, please use bit 1 of register pbdier to

disable the digital input to prevent current leakage. The bit 1 of pbdier register can

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

also disabled.

PB0 /

AD0 /

INT1

ST /

CMOS /

Analog

The functions of this pin can be:

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

/ pull-low resistor by software independently.

(2) Channel 0 of ADC analog input

(3) 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 0 of register pbdier to

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

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

disabled.

VDD /

AVDD

VDD /

AVDD

VDD: Digital positive power

AVDD: Analog positive power

VDD is the IC power supply while AVDD is the ADC power supply. AVDD and VDD

are double bonding internally and they have the same external pin.

GND /

AGND

GND /

AGND

GND: Digital negative power

AGND: Analog negative power

GND is the IC ground pin while AGND is the ADC ground pin. AGND and GND are

double bonding internally and they have the same external pin.

Notes:

IO: Input/Output; ST: Schmitt Trigger input; Analog: Analog input pin; CMOS: CMOS voltage level

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