MPC89x54A

8-bit micro-controller

This document contains information on a new product under development by Megawin. Megawin reserves the right to change or discontinue this

product without notice.

© Megawin Technology Co., Ltd. 2008 All rights reserved.

2008/12 version A12

MEGAWIN

Features .................................................................................................................................. 2

General Description ............................................................................................................... 3

Order Information: ................................................................................................................. 3

Pin Description....................................................................................................................... 4

Pin Definition................................................................................................................. 4

Pin Configuration........................................................................................................... 6

Block Diagram ....................................................................................................................... 6

Special Function Register ...................................................................................................... 8

Memory.................................................................................................................................. 9

Organization................................................................................................................... 9

Nonvolatile Registers:.................................................................................................. 10

RAM ............................................................................................................................ 11

Embedded Flash........................................................................................................... 12

Functional Description......................................................................................................... 13

TIMERS/COUNTERS................................................................................................. 13

TIMER0 (T0) AND TIMER1 (T1) ...................................................................... 15

TIMER2 ............................................................................................................... 16

Interrupt........................................................................................................................ 20

Watchdog Timer ........................................................................................................... 22

Serial IO Port (UART) ................................................................................................. 23

Reset............................................................................................................................. 26

Power Saving Mode and POF...................................................................................... 26

In System Programming (ISP) ..................................................................................... 27

In-Application Program ............................................................................................... 31

Note for Other SFR ...................................................................................................... 32

Absolute Maximum Rating (MPC89E54A) ........................................................................ 33

DC Characteristics (MPC89E54A)...................................................................................... 33

Absolute Maximum Rating (MPC89L54A) ........................................................................ 34

DC Characteristics (MPC89L54A)...................................................................................... 34

Package Dimension.............................................................................................................. 35

Revision History .................................................................................................................. 38