Philips LPC2101 - Page 124

© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
User manual Rev. 01 — 12 January 2006 124
Philips Semiconductors
UM10161
Volume 1
Chapter 11: I
2
C interfaces
The output for I
2
C is a special pad designed to conform to the I
2
C specification.
Fig 29. I
2
C serial interface block diagram
APB BUS
STATUS REGISTER
CONTROL REGISTER & SCL DUTY
CYCLE REGISTERS
ADDRESS REGISTER
COMPARATOR
SHIFT REGISTER
8
8
ACK
I2ADR
I2DAT
8
16
BIT COUNTER/
ARBITRATION &
SYNC LOGIC
SERIAL CLOCK
GENERATOR
TIMING &
CONTROL
LOGIC
STATUS
DECODER
status
bus
I2CONSET
I2SCLL
I2SCLH
I2CONCLR
interrupt
PCLK
INPUT
FILTER
OUTPUT
STAGE
SCL
INPUT
FILTER
OUTPUT
STAGE
SDA
I2STAT