AT87C5112 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT87C5112

8-bit Microcontroller with A/D Converter

Atmel Corporation 

Block Diagram

The AT8xC5112 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, the A/D converter is only 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 AT8xC5112 is proposed in 48-/52-pin count packages with Port 0 and Port 2

(address/

data buses).

(2)

XTAL1

Xtal

(2)

XTAL2

Osc

RC

Osc

RST

EA

ALE

PSEN

(2) (2)

CPU

EUART

BRG

RAM

256

x8

C51

CORE

IB-bus

ROM /OTP

8 K *8

(1) (1) (3)(3) (3) (3)

PCA

SPI

Watch

Dog

Timer 0 INT

Timer 1 Ctrl

(2)

(2) (3) (2) (3)

A/D

Converter

Parallel I/O Ports

Port 1 Port 3 Port 4 Port 0 Port 2

(3)

Notes: 1. Alternate function of Port 1.

2. Alternate function of Port 3.

3. Alternate function of Port 4.

2 AT8xC5112

4191C–8051–02/08

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