PMS232 datasheet(14/94 Pages) PADAUK

14 / 94 page

PMC232/PMS232 Series

12-bit ADC Enhanced FPPA

8-bit OTP Controller

Page 14 of 94

PDK-DS-PMx232_V104– Dec. 18, 2018

Pin Description

Pin Name

Pin Type &

Buffer Type

Description

PA7 /

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 /

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 /

RESET#

IO (OC)

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 pin.

Please notice that there is no pull-up resistor in this pin.

(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”.

Please put 33Ω resistor in

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

PA4 /

AD8

ST /

CMOS /

Analog

The functions of this pin can be:

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

resistor by software independently

(2) Channel 8 of ADC analog input

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 /

AD7 /

PWM /

COM3

ST /

CMOS /

Analog

The functions of this pin can be:

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

resistor independently by software

(2) Channel 7 of ADC analog input

(3) PWM output from Timer2

(4) COM3 for LCD. It can provide VDD/2 LCD bias voltage.

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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