Sharp ER-A750 Service Manual page 44
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Also See for ER-A750:
- Programming manual (40 pages) ,
- Installation manual (2 pages) ,
- Programming manual (40 pages)
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4) Pin description
No.
Pin No.
Pin name
1
1
DB4
2
2
DB5
3
3
DB6
4
4
DB7
5
41
DB0
6
42
DB1
7
44
DB2
8
45
DB3
9
46
RCVDT1
10
13
RCVDT2
11
47
GND
12
5
TRNCLK1-
13
15
TRNCLK2-
14
6
W-
15
7
CS1-
16
12
CS2-
17
8
RSLCT0
18
11
RSLCT1
19
9
R-
20
10
RCVRDY1
21
16
RCVRDY2
22
28
TRNRDY1
23
17
TRNRDY2
24
29
BRK1
25
18
BRK2
26
30
CTS1-
27
20
CTS2-
28
31
TRNEMP1
29
21
TRNEMP2
30
14
NC
31
24
NC
32
38
NC
33
48
NC
34
19
OPEN
35
43
OPEN
36
32
TRNDT1
37
22
TRNDT2
38
35
DSR1-
39
23
DSR2-
40
36
RTS1-
41
25
RTS2-
42
37
DTR1-
43
26
DTR2-
44
39
RCVCLK1-
45
27
RCVCLK2-
46
33
CLOCK
47
34
RST
48
40
VCC
I/O
ER-A750
I/O
DB4
I/O
DB5
I/O
DB6
Data bus
I/O
DB7
I/O
DB0
I/O
DB1
I/O
DB2
I/O
DB3
I
RCVDT1
RS-232 reception data signal
I
RCVDT2
–
GND
I
GND
Data transmission clock
I
GND
I
WRH
Write signal
I
CS1-
RS-232 chip select
I
CS2-
I
AH0
Address bus
I
AH1
I
RDH
Read signal
O
RCVRDY1
RS-232 data reception enable signal
O
RCVRDY2
O
TRNRDY1
RS-232 data transmission enable signal
O
TRNRDY2
O
BRK1
Break code detection signal
O
BRK2
I
(CTS1-)GND
RS-232 clear to send signal
I
(CTS2-)GND
O
TRNEMP1
RS-232 transmission buffer empty signal
O
TRNEMP2
–
NC
–
NC
–
NC
–
NC
NC
NC
O
TXD1
RS-232 transmission data signal
O
TXD2
I
DSR1-
RS-232 data set ready signal
I
DSR2-
O
NC
Request to send signal
O
NC
O
DTR1-
RS-232 data terminal ready signal
O
DTR2-
I
GND
Data reception clock
I
GND
I
CLK USART
Clock signal
I
RES USART
RESET signal
–
+5V
+5V
7 – 14
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