Zilog Z86193 - Manual (Page 69)

Z8
®
CPU
User Manual
UM001604-0108 Input/Output Ports
62
Figure 49. Port 3 Mode Register Configuration
Table 17. 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
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