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-
DR- R504X
No.
Pin Name
1/0
Function
41
XCEO
0
42 XCE1
0
XCE2
0
Chip
enable output.
43
44 XCE3
0
4S
POAO
1/0 Parallel output of general
-
purpose register A.
GRA BITO
I
46
POA1
110
Parallel output of general
-
purpose register A.
GRA BIT1
47
POA2
1/0 Parallel output of general - purpose register
A.
GRA BIT2
48
GND
-
Ground.
49
POA3
1/0 Parallel output of general
-
purpose
register
A.
GRA BIT3
so
POA4
1/0 Parallel
output of
general
-
purpose register A.
GRA BIT4
S1
POAS
1/0 Parallel output
of
general
-
purpose
register
A.
GRA BITS
S2
POA6
1/0 Parallel
output
of general - purpose register
A.
GRA BIT6
S3
POA7
1/0
Parallel output of
general - purpose
register
A.
GRA
BIT7
S4
POBO
0
Parallel
output
of
general
-
purpose
register
B.
GRB BITO
SS POB1
0
Parallel output
of
general -
purpose register
B.
GRB BIT1
c
S6
POB2
0
Parallel output of general
-
purpose
register
B.
GRB BIT2
S7
POB3
0
Parallel
output
of
general -
purpose
register
B.
GRB BIT3
S8
vcc
-
Power supply
voltage
pin.
S9 POB4
0
Parallel output of general
-
purpose register
B.
GRB BIT4
60 POBS
0
Parallel
output of
general
- purpose register
B.
GRB BITS
61
POB6
0
Parallel
output of
general
- purpose register
B.
GRB
BIT6
62
POB7
0
Parallel output
of general
-
purpose
register
B.
GRB BIT7
63
POCO
0
Parallel
output of
general
-
purpose
register C.
GRC BITO
(
64
POC1
0
Parallel
output
of
general
-
purpose
register
C.
GRC BIT1
6S
POC2
0
Parallel output
of
general
-
purpose register
C.
GRC
BIT2
66
POC3
0
Parallel
output
of general
-
purpose
register
C.
GRC BIT3
67
POC4
0
Parallel output
of
general - purpose register
C.
GRC BIT4
68 GND
-
Ground.
69 POCS
0
Parallel
output of
general
- purpose
reg
ister
C.
GRC BITS
70
POC6
0
Parallel output of
general
-
purpose register
C.
GRC BIT6
71
POC7
0
Parallel output of general
-
purpose register
C.
GRC BIT7
(
72 TESTS
I
73
TEST
I
74
TES TO
I
7S TEST1
I
Test
pins.
76
TEST2
I
77
TEST3
I
78
vcc
-
Power supply
voltage
pin.
79 TEST4
-
Test
pins.
80
N.C.
-
Not used.
48
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