80C554 Datasheet, PDF (34/76 Pages) NXP Semiconductors – 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP

Philips Semiconductors
80C51 8-bit microcontroller – 6 clock operation
16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I²C, PWM,
capture/compare, high I/O, 64L LQFP
Preliminary specification
80C554/83C554/87C554
P1.7/SDA
P1.7
INPUT
FILTER
OUTPUT
STAGE
8
S1ADR
ADDRESS REGISTER
COMPARATOR
S1DAT
SHIFT REGISTER
ACK
8
P1.6/SCL
INPUT
FILTER
OUTPUT
STAGE
P1.6
ARBITRATION &
SYNC LOGIC
SERIAL CLOCK
GENERATOR
TIMING
&
CONTROL
LOGIC
TIMER 1
OVERFLOW
S1CON
CONTROL REGISTER
f_OSC/4
INTERRUPT
8
STATUS BITS
STATUS
DECODER
S1STA
STATUS REGISTER
8
Figure 35. I²C Bus Serial Interface Block Diagram
su00966
2000 Nov 10
34