
1999 Apr 16
12
Philips Semiconductors
Product specification
Low-voltage microcontroller with 63-kbyte
OTP program memory and 2-kbyte RAM
P87CL881H
handbook, full pagewidth
MBK004
this diode is not
implemented
on the I
2
C-bus pins
VSS
VDD external
n
Q
from port latch
external
pull-up
I/O pin
input data
VDD
VSS
Fig.3 Port configuration options.
a. Open-drain.
c. High-impedance.
d. Push-pull.
b. Standard/quasi-bidirectional.
handbook, full pagewidth
MBK001
p1
p2
p3
input data
1 oscillator
period
n
VSS
VDD
strong pull-up
I/O pin
Q
from port latch
IN1
VSS
handbook, full pagewidth
MBK002
this diode is not
implemented
on the I
2
C-bus pins
input data
VDD
I/O pin
VSS
handbook, full pagewidth
MBK003
p
n
strong pull-up
Q
from port latch
VSS
VDD
VDD
I/O pin
input data
VSS