UPSD325X datasheet(14/176 Pages) STMICROELECTRONICS

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µPSD325X DEVICES

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Table 2. 80-Pin Package Pin Description

Port Pin

Signal

Name

Pin No.

In/Out

Function

Basic

Alternate

P0.0

AD0

I/O

External Bus

Multiplexed Address/Data bus A1/D1

P0.1

AD1

I/O

Multiplexed Address/Data bus A0/D0

P0.2

AD2

I/O

Multiplexed Address/Data bus A2/D2

P0.3

AD3

I/O

Multiplexed Address/Data bus A3/D3

P0.4

AD4

I/O

Multiplexed Address/Data bus A4/D4

P0.5

AD5

I/O

Multiplexed Address/Data bus A5/D5

P0.6

AD6

I/O

Multiplexed Address/Data bus A6/D6

P0.7

AD7

I/O

Multiplexed Address/Data bus A7/D7

P1.0

I/O

General I/O port pin

Timer 2 Count input

P1.1

T2EX

I/O

General I/O port pin

Timer 2 Trigger input

P1.2

RxD2

I/O

General I/O port pin

2nd UART Receive

P1.3

TxD2

I/O

General I/O port pin

2nd UART Transmit

P1.4

ADC0

I/O

General I/O port pin

ADC Channel 0 input

P1.5

ADC1

I/O

General I/O port pin

ADC Channel 1 input

P1.6

ADC2

I/O

General I/O port pin

ADC Channel 2 input

P1.7

ADC3

I/O

General I/O port pin

ADC Channel 3 input

P2.0

I/O

External Bus, Address A8

P2.1

I/O

External Bus, Address A9

P2.2

A10

I/O

External Bus, Address A10

P2.3

A11

I/O

External Bus, Address A11

P3.0

RxD1

I/O

General I/O port pin

UART Receive

P3.1

TxD1

I/O

General I/O port pin

UART Transmit

P3.2

INTO

I/O

General I/O port pin

Interrupt 0 input / timer0 gate

control

P3.3

INT1

I/O

General I/O port pin

Interrupt 1 input / timer1 gate

control

P3.4

I/O

General I/O port pin

Counter 0 input

P3.5

I/O

General I/O port pin

Counter 1 input

P3.6

SDA1

I/O

General I/O port pin

I2C Bus serial data I/O

P3.7

SCL1

I/O

General I/O port pin

I2C Bus clock I/O

P4.0

SDA2

I/O

General I/O port pin

I2C serial data I/O for DDC

interface

P4.1

SCL2

I/O

General I/O port pin

I2C clock I/O for DDC interface

P4.2

VSYNC

I/O

General I/O port pin

VSYNC input for DDC interface

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