Z51F3220FNX Datasheet, PDF (83/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
P4FSR (Port 4 Function Selection Register) : EFH
7
6
5
4
–
P4FSR6
P4FSR5
P4FSR4
–
R/W
R/W
R/W
3
P4FSR3
R/W
2
P4FSR2
R/W
1
0
P4FSR1
P4FSR0
R/W
R/W
Initial value : 00H
P4FSR6
P4FSR[5:4]
P4FSR[3:2]
P4FSR6[1:0]
P43 Function Select
0
I/OPort (SS0 function possible when input)
1
VLC0 Function
P42 Function Select
P4FSR5 P4FSR4 Description
0
0
I/OPort
0
1
VLC1 Function
1
0
SCK0 Function
1
1
Not used
P41 Function Select
P4FSR3 P4FSR2 Description
0
0
I/OPort
0
1
VLC2 Function
1
0
TXD0/SDA0/MOSI0 Function
1
1
Not used
P40 Function Select
P4FSR1 P4FSR0 Description
0
0
I/OPort
0
1
VLC3 Function
1
0
RXD0/SCL0/MISO0 Function
1
1
Not used
PS029902-0212
PRELIMINARY
80