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Description

The AT8xC5112 is a high performance ROM/OTP version of the 80C51 8-bit microcontroller. The AT8xC5112 retains all the features of the standard 80C51 with 8 Kbytes ROM/OTP program memory, 256 bytes of internal RAM, a 8-source, 4-level interrupt system, an on-chip oscillator and two timer/counters. The AT8xC5112 is dedicated for analog interfacing applications. For this, it has a 10-bit, 8 channels A/D converter and a five channels Programmable Counter Array. In addition, the AT8xC5112 has a Hardware Watchdog Timer, a versatile serial channel that facilitates multiprocessor communication (EUART) with an independent baud rate generator, a SPI serial bus controller and a X2 speed improvement mechanism. The X2 feature allows to keep the same CPU power at a divided by two oscillator frequency.

Features

? 80C51 Compatible

– Five I/O Ports

– Two 16-bit Timer/Counters

– 256 Bytes RAM

? 8K Bytes ROM/OTP Program Memory with 64 Bytes Encryption Array and 3 Security Levels

? High-Speed Architecture

– 33 MHz at 5V (66 MHz Equivalent)

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

? 10-bit, 8 Channels A/D Converter

? Hardware Watchdog Timer with Reset-out

? 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 85°C)

? Package: LQFP48 (Body 7*7*1.4 mm), PLCC52