Z80189 Datasheet, PDF (32/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PIN MULTIPLEXING (Continued)
PRELIMINARY
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
PIN #
VQFP
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
Table 12. Z80189 Pin-Out (Continued)
Multiplexed Pin Descriptions Primary, Secondary Pin Functions
PIN #
QFP
DEFAULT
FUNCTION
SECONDARY
FUNCTION
CONTROL
34
D7
35
PB0
36
PB1
37
PB2
38
PB3
39
PB4
40
PB5
41
PB6
42
PB7
43
/HDACK0
44
V
SS
45
HA9
46
HINTR1
47
HC2
48
HA5
49
V
DD
50
HDRQ0
51
/RAMCS
52
/ROMCS
53
EV1
54
EV2
55
HD0
56
HD1
57
HD2
58
HD3
59
HD4
60
HD5
61
HD6
62
HD7
TXS
/CTS0
/DCD0
TXA0
RXA0
TXA1
RXA1
RXS//CTS1
CKA0//DREQ0
CKA1//TENDO
T
OUT
CKS
/DREQ1
/RTSO
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
System Config Reg bit 5
System Config Reg bit 5
System Config Reg bit 5
System Config Reg bit 5
System Config Reg bit 5
System Config Reg bit 6
System Config Reg bit 6
System Config Reg bit 6
Host DMA Enable Reg bit 3
COM Decode Reg bit 0
System Config Reg bit 2
COM Decode Reg bit 0
(4)
(6) Host DMA Enable Reg bit 3
Sys Config Reg bit 1
Sys Config Reg bit 1
Sys Config Reg bit 1
Sys Config Reg bit 1
Sys Config Reg bit 1
Sys Config Reg bit 1
Sys Config Reg bit 1
Sys Config Reg bit 1
32
DS971890301