PMC131 datasheet(13/86 Pages) PADAUK

13 / 86 page

PMC131/PMS131/PMS130 Family

12-bit ADC Enhanced 8-bit Controller

Page 13 of 86

PDK-DS-PMX13X-EN_V107 – Dec. 26, 2019

Pin Description

Pin Name

Pin Type &

Buffer Type

Description

PA7 / X1

ST /

CMOS

The functions of this pin can be:

(1) Bit 7 of port A. It can be configured as digital input or two-state output, with pull-up

resistor.

(2) X1 when crystal oscillator is used.

If this pin is used for crystal oscillator, bit 7 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 7 of padier register is “0”.

PA6 / X2

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-up

resistor.

(2) 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

IO (OD)

ST /

CMOS

The functions of this pin can be:

(1) Bit 5 of port A. It can be configured as digital inputor open-drain output.

(2) Hardware reset.

Please note that PA5 does NOT have pull-up resistor.

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 /

INT1A

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-up

resistor by software independently.

(2) Channel 9 of ADC analog input

(3) External interrupt line 1A. 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 /

PWM1

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-up

resistor by software independently.

(2) Channel 8 of ADC analog input

(3) 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.

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