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T80C5112

8-bit Microcontroller with A/D converter

Atmel Corporation 

8-bit Microcontroller with A/D converter

T80C5112

1. Description

The T80C5112 is a high performance ROM/OTP version

of the 80C51 8-bit microcontroller.

The T80C5112 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 T80C5112 is dedicated for analog interfacing

applications. For this, it has an 10-bit, 8 channels A/D

converter and a five channels Programmable Counter

Array.

In addition, the T80C5112 has a Hardware Watchdog

Timer with its own low power oscillator, 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.

The fully static design of the T80C5112 allows to reduce

system power consumption by bringing the clock

frequency down to any value, even DC, without loss of

data.

The T80C5112 has 3 software-selectable modes of

reduced activity for further reduction in power

consumption. In the idle mode the CPU is frozen while

the peripherals are still operating. In the quiet mode, the

A/D converter only is operating. In the power-down

mode the RAM is saved and all other functions are

inoperative. Two oscillators source, crystal and RC,

provide a versatile power management.

The T80C5112 is proposed in 48/52 pin count packages

with Port 0 and Port 2 (address / data busses).

2. Features

· 80C51 Compatible

· Crystal or ceramic oscillator with hardware set

· Five I/O ports

up (32 KHz or 33/40 MHz)

· Two 16-bit timer/counters

· Internal RC oscillator (12 MHz)

· 256 bytes RAM

· Programmable prescaler

· 8Kbytes ROM/OTP program memory with 64 bytes

encryption array and 3 security levels.

· Active oscillator during reset defined by hardware

set up

· High-Speed Architecture

· 33MHz @ 5V (66 MHz equivalent)

· Timer 0 subclock mode for Real Time Clock.

· Programmable counter array with High speed output,

Compare / Capture, Pulse Width Modulation and

· 20MHz @ 3V (40 MHz equivalent)

Watchdog timer capabilities

· X2 Speed Improvement capability (6 clocks/ · Interrupt Structure with:

·

·

machine cycle)

10-bit, 8 channels A/D converter

Hardware Watchdog Timer with integrated low

power oscillator (20m A) and Reset-Out

·

· 8 Interrupt sources,

· 4 interrupt priority levels

Power Control modes:

· Programmable I/O mode: standard C51, input only,

· Idle mode

push-pull, open drain.

· Power-down mode

· Asynchronous port reset, Power On Reset

· Power-off Flag, Power fail detect, Power on Reset

· Full duplex Enhanced UART with baud rate generator · Power supply: 2.7 to 5.5V

· SPI, master/slave mode

· Temperature ranges: Commercial (0 to 70C) and

Industrial (-40 to 85 C), optionnal extented

· Dual system clock

· Package:LQFP48 (body 7*7*1.4mm), PLCC52

Rev. B - November 10, 2000

1

Preliminary

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