AT83C5111 datasheet(5/86 Pages) ATMEL

5 / 86 page

AT8xC5111

4190A–8051–11/02

Pin Configuration

Pin Descriptions

XTAL1

P1.7/CEX4

P4.7/AIN7

VCC

P1.6/CEX3

P3.1/TxD

P1.3/CEX0

P1.2/ECI

P1.4/CEX1

P4.4/MISO/AIN4

P4.6/SPSCK/AIN6

P4.5/MOSI/AIN5

P4.3/

INT1/AIN3

P4.2/

SS/AIN2

P4.1/AIN1/T1

P4.0/AIN0

P3.0/RxD

P1.5/CEX2

P3.3/T0

P3.2/INT0

SO24

DIL24

VREF

VSS

RST/VPP

XTAL2

XTAL1

VREF

AVCC

P1.6/CEX3

P3.1/TxD

P1.3/CEX0

P1.2/ECI

P1.4/CEX1

P4.4/MISO/AIN4

P4.6/SPSCK/AIN6

P4.5/MOSI/AIN5

P4.3/

INT1/AIN3

P4.2/

SS/AIN2

P4.1/AIN1/T1

P4.0/AIN0

P3.0/RxD

P1.5/CEX2

P3.3/T0

P3.2/INT0

SSOP24

VSS

AVSS

VCC

RST/VPP

Mnemonic

Type

Name and Function

Ground: 0V reference

Power Supply: This is the power supply voltage for normal, idle and power-down operation.

VREF

VREF: A/D converter positive reference input

RST/VPP

RST/V

PP: Reset/Programming Supply Voltage:

A low on this pin for two machine cycles while the oscillator is running, resets the device. This pin

has no pull-up. In order to use the internal power-on reset, an external pull-up resistor must be

connected.

This pin also receives the 12V programming pulse which will start the EPROM programming and the

manufacturer test modes.

XTAL1

XTAL1 : Input to the inverting oscillator amplifier and input to the internal clock generator circuits

XTAL2

XTAL2 : Output from the inverting oscillator amplifier

P1.2 - P1.7

I/O

Port 1: Port 1 is an 6-bit programmable I/O port . See Section “Ports”, page 18 for a description of

I/O ports.

Alternate functions for Port 1 include:

I/O

ECI (P1.2): External Clock for the PCA

I/O

CEX0 (P1.3): Capture/Compare External I/O for PCA module 0

I/O

CEX1 (P1.4): Capture/Compare External I/O for PCA module 1

I/O

CEX2 (P1.5): Capture/Compare External I/O for PCA module 2

I/O

CEX3 (P1.6): Capture/Compare External I/O for PCA module 3

I/O

CEX4 (P1.7): Capture/Compare External I/O for PCA module 4

P3.0 - P3.3

I/O

Port 3: Port 3 is an 6-bit programmable I/O port with internal pull-ups. See Section "Ports", page 18

for a description of I/O ports.

Port 3 also serves the special features of the 80C51 family, as listed below.

I/O

RXD (P3.0): Serial input port

I/O

TXD (P3.1): Serial output port

AT83C5111 数据表(PDF) 5 Page - ATMEL Corporation

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