AT87C5111_14 datasheet(1/86 Pages) ATMEL

Part #	AT87C5111

Description	Programmable I/O Mode Standard C51, Input Only, Push-pull, Open Drain

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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Rev. 4190B–8051–02/08

Features

• 80C51 Compatible

– Three I/O Ports

– Two 16-bit Timer/Counters

– 256 Bytes RAM

• 4K Bytes ROM/OTP Program Memory with 64 Bytes Encryption Array and 3 Security

Levels

• High-Speed Architecture

– 33 MHz at 5V (66 MHz Equivalent)

– 20 MHz at 3V (40 MHz Equivalent)

– X2 Speed Improvement Capability (6 Clocks/Machine Cycle)

• 10-bit, 8 Channels A/D Converter

• Hardware Watchdog Timer

• Programmable I/O Mode: Standard C51, Input Only, Push-pull, Open Drain

• Asynchronous Port Reset

• Full Duplex Enhanced UART with Baud Rate Generator

• SPI, Master Mode

• Dual System Clock

– Crystal or Ceramic Oscillator (33/40 MHz)

– Internal RC Oscillator (12 MHz)

– Programmable Prescaler

• Programmable Counter Array with High-speed Output, Compare/Capture, Pulse Width

Modulation and Watchdog Timer Capabilities

• Interrupt Structure

– 8 Interrupt Sources

– 4 Interrupt Priority Levels

• Power Control Modes

– Idle Mode

– Power-down Mode

– Power-off Flag

• Power Supply: 2.7 - 5.5V

• Temperature Range: Industrial (-40 to 85oC)

• Package: SO24, DIL24, SSOP24

Description

The AT8xC5111 is a high-performance ROM/OTP version of the 80C51 8-bit micro-

controller in low pin count package.

The AT8xC5111 retains all the features of the standard 80C51 with 4K Bytes

ROM/OTP program memory, 256 bytes of internal RAM, an 8-source, 4-level interrupt

system, an on-chip oscillator and two timer/counters.

The AT8xC5111 is dedicated for analog interfacing applications. For this, it has a 10-

bit, 8 channels A/D converter and a five-channel Programmable Counter Array.

In addition, the AT8xC5111 has a Hardware Watchdog Timer, a versatile serial chan-

nel that facilitates multiprocessor communication (EUART) with an independent baud

rate generator, an SPI serial bus controller and a X2 speed improvement mechanism.

The X2 feature permits keeping the same CPU power at an oscillator frequency

divided by two. The prescaler allows to decrease CPU and peripherals clock

frequency.

The fully static design of the AT8xC5111 can reduce system power consumption by

bringing the clock frequency down to any value, even DC, without loss of data.

The AT8xC5111 has 3 software-selectable modes of reduced activity for further reduc-

tion in power consumption. In the idle mode, the CPU is frozen while the peripherals

are still operating. In the quiet mode, only the A/D converter is operating.

Low Pin Count

8-bit

Microcontroller

with A/D

Converter

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AT87C5111

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