Read Sharp ER-A490 (serv.man4) Service Manual online
4) Pin description
OPC1 pin table
The signals marked with "-" at the end are LOW active signals. Example: "CS1-" = "CS1"
No.
Pin No.
Pin name
I/O
Pin
ER-A5RS
Description
1
80
SL00
I
ICU
SL00
RS-232/UNIT0 channel select
2
79
SL01
I
ICU
SL01
3
78
SL02
I
ICU
SL02
4
77
SL10
I
ICU
SL10
RS-232/UNIT1 channel select
5
76
SL11
I
ICU
SL11
6
75
SL12
I
ICU
SL12
7
95
SL20
I
ICU
GND
RS-232/UNIT2 channel select
8
96
SL21
I
ICU
GND
9
52
SL22
I
ICU
GND
10
54
SL30
I
ICU
GND
RS-232/UNIT3 channel select
11
93
SL31
I
ICU
GND
12
94
SL32
I
ICU
GND
13
36
CS0-
O
O
CS1-
RS-232 USART chip select
14
32
CS1-
O
O
CS2-
15
2
CS2-
O
O
NC
16
1
CS3-
O
O
NC
RS-232/INLINE USART chip select
17
81
CD0-
I
IS
DCD1-
RS-232 control signal CD- input
18
46
CD1-
I
IS
DCD2-
19
88
CD2-
I
IS
GND
20
38
CD3-/P0-
I
IS
GND
RS-232 CD-/INLINE P0-
21
82
CTS0-
I
IS
CTS1-
RS-232 control signal CTS- input
22
47
CTS1-
I
IS
CTS2-
23
86
CTS2-
I
IS
GND
24
43
CTS3-/P1-
I
IS
GND
RS-232 CTS-/INLINE P1-
25
48
CI0-
I
IS
CI1-
RS-232 control signal CI- input
26
45
CI1-
I
IS
CI2-
27
87
CI2-
I
IS
GND
28
99
CI3-/P2I
I
IS
GND
RS-232 CI-/INLINE P2I
29
55
BRK0
I
ISC
BRK1
RS-232 USART BREAK signal
30
70
BRK1
I
ISC
BRK2
31
27
POFF-
I
IS
POFF-
POFF signal (LOW: P-OFF, HIGH: P-ON)
32
4
BRK3
I
IS
GND
RS-232/INLINE USART BREAK signal
33
57
RCVRDY0
I
ISC
RCVRDY1
RS-232 USART RCVRDY signal
34
72
RCVRDY1
I
ISC
RCVRDY2
35
74
RCVRDY2
I
ISC
GND
36
6
RCVRDY3
I
IS
GND
RS-232/INLINE USART RCVRDY signal
37
59
TRNRDY0
I
ISC
TRNRDY1
RS-232 USART TRNRDY signal
38
71
TRNRDY1
I
ISC
TRNRDY2
39
98
TRNRDY2
I
ISC
GND
40
5
TRNRDY3
I
IS
GND
RS-232/INLINE USART TRNRDY signal
41
56
TRNEMP0
I
ISC
TRNEMP1
RS-232 USART TRNEMP signal
42
60
TRNEMP1
I
ISC
TRNEMP2
43
100
TRNEMP2
I
ISC
GND
44
3
TRNEMP3
I
IS
GND
RS-232/INLINE USART TRNEMP signal
45
58
RCVDT0
I
ISC
RCVDT1
RS-232 RCVDT signal (LOW: TIMER START)
46
73
RCVDT1
I
ISC
RCVDT2
47
97
RCVDT2
I
ISC
GND
48
41
RCVDT3
I
IS
GND
RS-232/INLINE RCVDT signal
49
20
RSRQ-
O
3S
RSRQ-
RS-232 IRQ- signal
50
83
TRV-
I
ISC
+5V
INLINE YES/NO
51
7
RXDATA0
O
O
NC
INLINE RXDATA OUT
52
42
TXE
O
O
NC
INLINE TRNS ENABLE
53
84
TRRQ-
O
3S
NC
INLINE IRQ- signal
54
28
TRQ1-
O
3S
TRQ1
TIMER IRQ signal (RS-232)
3 – 3
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