Zilog Z80180 - Manual (Page 20)

Z8018x
Family MPU User Manual
UM005003-0703
5
Figure 3. 80-Pin QFP
Z8X180
ST
A0
A1
A2
A3
V
SS
A4
NC
A5
A6
A7
1
2
3
4
6
7
8
9
10
5
11
12
13
14
15
16
17
NMI
INT1
INT2
A8 18
A9 19
A10 20
A11 21
NC 22
NC 23
A12 24
INT0
NC
NC
64
63
62
61
59
58
57
56
55
60
54
53
52
51
50
49
48
47
46
45
44
43
42
41
CKS
RXS/CTS1
TXS
CKA1/TEND0
RXA1
TEST
TXA1
NC
CKA0/DREQ0
RXA0
TXA0
RFSH
TEND1
DREQ1
DCD0
CTS
RTS0
D7
NC
NC
D6
HALT
NC
NC
A1
8/
T
O
U
T
V
CC
A19 V
SS D0 D1 D2 D3 D4
A13 A17 NC A16 A14 A1
5
D5
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
XT
AL
V
SS
V
SS
Ph
i
RD WR MI E MREQ R
ESET
EXT
A
L
NC WA
IT
BU
SR
E
Q
BU
SAC
K
IO
R
Q
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65