P87C554 NXP Semiconductors, P87C554 Datasheet - Page 35

• Manufacturer Part Number: P87C554
• Description: The P87C554 Single-Chip 8-Bit Microcontroller is manufactured inan advanced CMOS process and is a derivative of the 80C51microcontroller family
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2002 Mar 25
80C51 8-bit microcontroller – 12 clock operation
16K/512 OTP/RAM, 8 channel 10-bit A/D, I
capture/compare, high I/O
P1.7/SDA
P1.6/SCL
OUTPUT
OUTPUT
FILTER
FILTER
STAGE
STAGE
INPUT
INPUT
P1.7
P1.6
Figure 35. I
STATUS BITS
OVERFLOW
TIMER 1
S1CON
S1ADR
S1DAT
S1STA
2
C Bus Serial Interface Block Diagram
2
C, PWM,
ARBITRATION &
SERIAL CLOCK
GENERATOR
SYNC LOGIC
33
ADDRESS REGISTER
CONTROL REGISTER
STATUS REGISTER
SHIFT REGISTER
COMPARATOR
DECODER
STATUS
CONTROL
TIMING
LOGIC
&
8
8
8
8
ACK
INTERRUPT
f
OSC
/4
su00966
P87C554
Product data