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P89LPC901

8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM

Philips Electronics 

Philips Semiconductors

4. Block diagram

P89LPC901/902/903

8-bit microcontrollers with two-clock 80C51 core

P89LPC901

HIGH PERFORMANCE

ACCELERATED 2-CLOCK 80C51 CPU

1 kB

CODE FLASH

128-BYTE

DATA RAM

INTERNAL BUS

PORT 3

CONFIGURABLE I/Os

PORT 1

CONFIGURABLE I/Os

PORT 0

CONFIGURABLE I/Os

KEYPAD

INTERRUPT

WATCHDOG TIMER

AND OSCILLATOR

CRYSTAL

OR

RESONATOR

PROGRAMMABLE

OSCILLATOR DIVIDER

CPU

CLOCK

CONFIGURABLE

OSCILLATOR

ON-CHIP

RC

OSCILLATOR

Fig 1. P89LPC901 block diagram.

TIMER 0

TIMER 1

REAL-TIME CLOCK/

SYSTEM TIMER

ANALOG

COMPARATOR

POWER MONITOR

(POWER-ON RESET,

BROWNOUT RESET)

002aaa444

9397 750 12293

Product data

Rev. 04 — 21 November 2003

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

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