MPC89E58AP 8-bit single-chip microcontroller PLCC-44

Description

Overview

The MPC89E58AP is an enhanced 8-bit 8051-compatible microcontroller from Megawin, designed for embedded control and general-purpose microcontroller applications. It combines a classic 80C51 CPU architecture with integrated Flash program memory, RAM, timers, UART, watchdog, ISP, and IAP capabilities.

The device operates from 4.5 V to 5.5 V and supports selectable 12T or 6T instruction modes, with operating frequencies up to 48 MHz in 12T mode or 24 MHz in 6T mode. The MPC89E58AP is supplied in a 44-pin PLCC package with additional I/O compared with the standard 40-pin 8051 package.

Key Features

• Enhanced 8-bit 8051 / 80C51-compatible CPU
• 32 KB on-chip Flash program memory
• Selectable 12T / 6T operating modes
• Up to 48 MHz @ 12T
• Up to 24 MHz @ 6T
• 256 bytes scratch-pad RAM
• 1 KB auxiliary RAM
• 128-byte? — see note below regarding memory terminology
• ISP and IAP programming capability
• Up to 31 KB programmable data Flash when ISP memory is configured accordingly
• 3 × 16-bit Timer/Counter
• Enhanced UART
• Hardware UART address recognition
• Dual DPTR
• 15-bit Watchdog Timer with 8-bit prescaler
• Idle and Power-Down modes
• Four 8-bit bidirectional ports
• Additional 4-bit Port 4 on PLCC-44/PQFP-44 versions
• Four-level interrupt priority
• Flash security/encryption features
• PLCC-44 package

Technical Specifications

The PLCC-44 version provides 36 I/O pins, with the additional four Port 4 bits available specifically on the PLCC-44 and PQFP-44 versions.

Flash Memory

The MPC89E58A family provides 32 KB of on-chip program Flash. A portion of the Flash can be configured for ISP programming space, with the remaining area available for IAP/data-Flash use. The datasheet describes configurable 1 KB, 2 KB, or 4 KB ISP memory, with up to 31 KB programmable data Flash depending on configuration.

Timers

The MCU includes three 16-bit timer/counters. Timer 2 additionally supports up/down counting and programmable clock output functionality.

UART

The integrated enhanced UART supports features such as:

• Standard serial communication
• Frame-error detection
• Hardware address recognition

This makes the device suitable for both conventional UART communication and multi-device serial systems.

GPIO

The device provides four standard 8-bit ports plus an additional 4-bit Port 4 on the PLCC-44 package, giving up to 36 general-purpose I/O pins.

Power & Programming

Power

• Supply voltage: 4.5–5.5 V
• Suitable for conventional 5 V 8051-based systems
• Supports Idle and Power-Down operating modes

Programming

The MPC89E58AP supports:

• ISP — In-System Programming
• IAP — In-Application Programming
• Flash memory security mechanisms
• On-chip Flash programming

A compatible Megawin programmer/debugging solution is required for programming the device.

Applications

• 8051-compatible embedded systems
• Industrial control
• Automation equipment
• Consumer electronics
• Appliance control
• Serial communication controllers
• Motor and actuator control
• LED and display control
• Keypad interfaces
• General-purpose embedded controllers
• Legacy 8051 system replacement or redesign

What’s Included

• 1 × MPC89E58AP 8-Bit Microcontroller
• Package: PLCC-44
• Surface-mount IC

Notes

• MPC89E58AP is the PLCC-44 version of the MPC89E58A family. The corresponding package variants include MPC89E58AE (DIP-40) and MPC89E58AF (PQFP-44).
• This is an 8051-compatible MCU, making it suitable for projects based on the traditional 8051 architecture.
• The device requires 4.5–5.5 V, so it is not intended as a direct 3.3 V MCU.
• The manufacturer documentation describes 256 bytes of scratch-pad RAM plus 1 KB auxiliary RAM. These should not be represented simply as a single 1.25 KB conventional 8051 RAM block.
• No ADC or PWM peripheral is specified in the referenced MPC89E58A documentation, so these should not be advertised as built-in features.
• Programmer/debugger is not included; this listing is for the microcontroller IC only.