Z80189 Datasheet, PDF (34/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PIN #
VQFP
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PRELIMINARY
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
Table 12. Z80189 Pin-Out (Continued)
Multiplexed Pin Descriptions Primary, Secondary Pin Functions
PIN #
QFP
DEFAULT
FUNCTION
SECONDARY
FUNCTION
CONTROL
63
PC5
64
PC3
65
PC2
/MWR
66
PC1
67
PC0
68
PC4
69
HA8
70
V
SS
71
/IOCS1
IEO
72
HA7
IEI
73
V
DD
74
HA6
75
HAEN
76
HINTR2
77
/HRD
/DCD0
78
/HWR
/CTS0
79
/HDDIS
TXA0
80
HA0
81
HA1
RXA0
82
HA2
83
/HCS
HC1
84
/HALT
85
HA3
/RFSH
86
/IORQ
87
/MREQ
/MRD
88
/IOCS2
E
89
/M1
90
/WR
91
/RD
92
PHI
93
V_SS
94
XTAL
95
EXTAL
96
HA4
/WAIT
97
HDRQ1
/BUSACK
98
/HDACK1
/BUSREQ
99
/RESET
100
/NMI
1
/INT0
2
/INT1
PC6
3
/INT2
PC7
Int Edge/Pin Reg bit 3
Int Edge/Pin reg bit 2
(1) COM Decode reg bit 0
(2)
(2)
Sys Conf reg bit 1
(2)
(3)
COM Decode reg bit 0
Int Edge/Pin Reg bit 3
I/O brg reg bit 2
(5) COM Decode reg bit 0
(6) Host DMA Enable Reg bit 2
(5) Host DMA Enable Reg bit 2
All inputs feature an auto latch that assures that an uncon- Z189 or any measurement device connected to the inputs.
nected input is seen as a logic high or logic low by both the The auto latch will latch onto the previous state of input pin.
Notes:
1. IEI pulled high internally when default function is active
2. Pins also act as ASCI inputs only when Port B is enabled
3. MIMIC access is disabled until the system configuration register is
written. /HCS can be forced to output the result of COM Port Decoder.
4. Pin simultaneously acts as input for both default and secondary
functions.
5. /WAIT is pulled high internally when default function is active.
6. Upon power-up or reset, this pin is tri-state.
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DS971890301