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P89LPC921 Datasheet(PDF) 27 Page - NXP Semiconductors

Part # P89LPC921
Description  8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM
PDF  45 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P89LPC921 Datasheet(HTML) 27 Page - NXP Semiconductors

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Philips Semiconductors
P89LPC920/921/922
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 06 — 21 November 2003
27 of 45
9397 750 12285
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Fig 9.
I2C-bus serial interface block diagram.
002aaa421
ADDRESS REGISTER
COMPARATOR
SHIFT REGISTER
8
I2ADR
ACK
BIT COUNTER /
ARBITRATION &
SYNC LOGIC
8
I2DAT
TIMING
&
CONTROL
LOGIC
SERIAL CLOCK
GENERATOR
CCLK
INTERRUPT
INPUT
FILTER
OUTPUT
STAGE
INPUT
FILTER
OUTPUT
STAGE
P1.3
P1.3/SDA
P1.2/SCL
P1.2
TIMER 1
OVERFLOW
CONTROL REGISTERS &
SCL DUTY CYCLE REGISTERS
I2CON
I2SCLH
I2SCLL
8
STATUS
DECODER
STATUS BUS
STATUS REGISTER
8
I2STAT



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