HP 8642A Operating Manual page 367

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LWR. UHR
ADOflESS OECODEH
+ 5V ( F l )
U19
16
1 C 7
BIN/OCT
EN
k 15 3 0 H 1 SEL
k 1 2 R0H4 SEL
1
14 R0M2 SEL
ROHl SEL
R0H2 SEL/T
MEMORY
SELECT
13 ROM3 SEL
RQMJSEL/i
flOM£_SEL/i
11 RAH1 SEL
RAM1 SEL,H
RAWg SEL/f
k 1 0 RAH2 SEL
k. 9 EgROH SEL
o?
k 7 1 / 0 SEL
+ 5V ( F l
U17 if 16
BIN/OCT
4
L
EN
15 H P - I B SEL
14
RS 3 3 2 INT
13
TIMER SEL
12 A / 0 SEL
11
D/A SEL
10
LATCH SEL
CAL BD SEL
H P - I B
SEL
04
TIMER SEL
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UNUSED
ADDRESS
DET
U9E
©6
LATCH " ° l
JJHR ^ ;
2 5
LATCH |
LWR . , „ „
k C L K
M i
KJJQS
K LDS
LATCH
k UHR
LATCH
LHR
R0H1 SEL
ROMS SEL
R0M3SEL
R0M4SEL
RAH1 SEL
RAH2 SEL
A19
N.
N.
EOE
A50
OE
QAWR
fl/W
A/O SEL
D/A SEL
LATCH SEL
Al
AS
A3
A4
A5
A6
A7
OE
J
- < 2 0
p / o l
J4 I
P/0
PB
P/0
RS-232 SEL
J
?
UHR
LWR
CAL 8 0 SEL
EOE
I
A4
A5
AS
A7
AB
AS
A10
A l l
13
n
09
LUXR.LLWR
11
I O I
l o T l
2
4
17
19
15
14
Q
y
10
11
12
B
7
5
6
13
1
,
u
P/0 SE
TEST P
m
Isl
DAWR
GD
1 0
OUTPUT ENABLE
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F i g u r e
sss
8F-105
8F-105