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89LPC925

8-bit microcontrollers with accelerated two-clock 80C51 core 4 kB/8 kB 3 V low-power Flash with 8-bit A/D converter

Philips Electronics 

Philips Semiconductors

P89LPC924/925

8-bit microcontrollers with accelerated two-clock 80C51 core

P1.3/SDA

P1.2/SCL

8

P1.3

INPUT

FILTER

OUTPUT

STAGE

ADDRESS REGISTER

I2ADR

COMPARATOR

SHIFT REGISTER

8

ACK

I2DAT

INPUT

FILTER

OUTPUT

STAGE

P1.2

BIT COUNTER /

ARBITRATION &

SYNC LOGIC

SERIAL CLOCK

GENERATOR

TIMING

&

CONTROL

LOGIC

TIMER 1

OVERFLOW

I2CON

I2SCLH

I2SCLL

CONTROL REGISTERS &

SCL DUTY CYCLE REGISTERS

8

CCLK

INTERRUPT

STATUS BUS

STATUS

DECODER

I2STAT

STATUS REGISTER

8

Fig 9. I2C-bus serial interface block diagram.

002aaa421

9397 750 13459

Product data

Rev. 02 — 15 June 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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