ZiLOG Z8 User Manual

Z8 Microcontrollers
I/O Ports ZiLOG
5-18 UM001601-0803
Figure 5-22. Port 3 Mode Register Configuration
D7 D6 D5 D4 D3 D2 D1 D0
(Write-Only)
0 P31, P32 Digital Mode
1 P31, P32 Analog Mode
0 P32 = Input P35 = Output
0 Port 2 Open-Drain
1 Port 2 Push-Pull
00 P33 = Input P34 = Output
01 P33 = Input P34 = /DM
Port 3 Mode Register
Register F7H
10 P33 = Input P34 = /DM
0 P31 = Input P36 = Output
0 P30 = Input P37 = Output
1 P30 = Serial In P37 = Serial Out
0 Party ON
1 Party OFF
Table 5-1. Port 3 Line Functions
Function Line Signal
Inputs P30 Input
P31 Input
P32 Input
P33 Input
Outputs P34 Output
P35 Output
P36 Output
P37 Output
Port 0 Handshake Input P32 DAV0/RDY0
Port 1 Handshake Input P33 DAV1/RDY1
Port 2 Handshake Input P31 DAV2/RDY2
Port 0 Handshake Output P35 RDY0/DAV0
Port 1 Handshake Output P34 RDY1/DAV1
Port 2 Handshake Output P36 RDY2/DAV2
Analog Comparator Input P31 AN1
P32 AN2
P33 REF
Analog Comparator Output P34 AN1-OUT
P35 AN2-OUT
P37 AN2-OUT
Interrupt Requests P30 IRQ3
P31 IRQ2
P32 IRQ0
P33 IRQ1
Serial Input (UART) P30 DI
Serial Output (UART) P37 DO
SPI Slave Select P35 SS
SPI Clock P34 SK
Counter/Timer P31 T
IN
P36 T
OUT
External Memory Status P34 DM
Table 5-1. Port 3 Line Functions
Function Line Signal

ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English