Input/Output Ports - Philips CEM2100/00 Service Manual

21. Input/Output Circuit

21.2 Input/Output Ports

21.2 Input/Output Ports
Port
P1
P3
P2
P5
P0
P4
I/O
Initial "High-Z"
Data output
I/O
Disable
Pin input
Initial "High-Z"
I/O
Data output
Output latch input
Pin input
Initial "High-Z"
I/O
Data output
Output latch input
Pin input
Initial "High-Z"
I/O
Data output
Output latch input
Pin input
Initial "High-Z"
P-ch control
Data output
Output latch input
I/O
Disable
Pin input (Control input)
Input/Output Circuitry
VDD
Page 264
T5CL8
Remarks
Tri-state I/O
Hysteresis input
Ω
R = 100 (typ.)
R
Sink open drain output
High current output
Ω
R = 100 (typ.)
R
VDD
Sink open drain output
Hysteresis input
Ω
R = 100 (typ.)
R
Sink open drain output
High current output
Hysteresis input
Ω
R
R = 100 (typ.)
VDD
Sink open drain output or
C-MOS output
Hysteresis input
Ω
R
R = 100
(typ.)