Read Sharp ER-A450 (serv.man2) Service Manual online
3) Pin description
Pin
No.
Signal
name
In/
Out
Function
1
RF
Out
Receipt side paper feed solenoid
2
JF
Out
Journal side paper feed solenoid
3
PCUT
Out
Printer partial cut signal (NU)
4
FCUT
Out
Printer auto cut signal (NU)
5
VF
Out
Multi line validation paper feed (NU)
6
STAMP
Out
Printer stamp signal (NU)
7
SLFS
Out
Slip printer paper feed singnal (NU)
8
SLRS
Out
Slip printer release signal (NU)
9
SLMTD
Out
Slip printer motor drive signal (NU)
10
RES
Out
Peripheral output reset
11
TRG
Out
Dot head trigger signal (NU)
12
TRG
Out
Dot head trigger signal
13
POFF
In
Power off signal input
14
INT1
In
(NU)
15
HTS1
Out
8 bit serial port output (for CKDC8)
16
SCK1
Out
Serial port shift clock output (for CKDC8)
17
STH1
In
8 bit serial port input (for CKDC8)
18
RAS VZ
—
Chip select (NU)
19
—
—
Nu
20
VCC
—
+5V
21
GND
—
GND
22
INTMCR
—
Interrupt (NU)
23
Out
Turns active when reset and power down
is met
is met
24
SLTMG
In
Slip printer timing signal (NU)
25
SLRST
In
Slip printer reset signal (NU)
26
AS
In
Address strobe
27
RD
In
Read strobe
28
WR
In
Write strobe
29
φ
In
(
φ
) System clock (7.3728 MHz)
30
Out
Slip printer printhead drive signal (dot7)
(NU)
(NU)
31
Out
Slip printer printhead drive signal (dot6)
(NU)
(NU)
32
Out
Slip printer printhead drive signal (dot5)
(NU)
(NU)
33
GND
—
GND
34
Out
Slip printer printhead drive signal (dot4)
(NU)
(NU)
35
Out
Slip printer printhead drive signal (dot3)
(NU)
(NU)
36
Out
Slip printer printhead drive signal (dot2)
(NU)
(NU)
37
Out
Slip printer printhead drive signal (dot1)
(NU)
(NU)
38
D0
I/O
Data bus 0
39
D1
I/O
Data bus 1
40
D2
I/O
Data bus 2
41
D3
I/O
Data bus 3
42
GND
—
GND
43
D4
I/O
Data bus 4
44
D5
I/O
Data bus 5
45
D6
I/O
Data bus 6
46
D7
I/O
Data bus 7
47
SPRQ
Out
SSP interrupt request to CPU
48
RESET
In
MPCA reset
49
SHEN
In
Shift enable from CKDC8
Pin
No.
Signal
name
In/
Out
Function
50
INT3
In
Interrupt signal (Nu)
51
RXD2
Out
8 bit serial port output to CPU
52
TXD2
In
8 bit serial port input from CPU
53
SCK2
In
Serial port shift clock input from CPU.
54
IRQ0
Out
Interrupt request to CPU
55
A0
In
Address bus 0
56
A1
In
Address bus 1
57
A2
In
Address bus 2
58
A3
In
Address bus 3
59
A4
In
Address bus 4
60
A5
In
Address bus 5
61
GND
—
GND
62
VCC
—
+5V
63
A6
In
Address bus 6
64
A7
In
Address bus 7
65
A8
In
Address bus 8
66
A9
In
Address bus 9
67
A10
In
Address bus 10
68
A11
In
Address bus 11
69
A12
In
Address bus 12
70
A13
In
Address bus 13
71
A14
In
Address bus 14
72
A15
In
Address bus 15
73
A16
In
Address bus 16
74
A17
In
Address bus 17
75
A18
In
Address bus 18
76
A19
In
Address bus 19
77
A20
In
Address bus 20
78
A21
In
Address bus 21
79
A22
In
Address bus 22
80
LCDC
—
LCD CS (NU)
81
A23
In
Address bus 23
82
TRGI
In
Dot pulse control/drive signal
83
PTMG
Out
Printer timing signal
84
PRST
Out
Printer reset signal
85
RDY
In
Ready from FMC unit
86
IPLON
In
To option connector (NU)
87
MD1
In
Mode select input (+5V)
88
MD0
In
Mode select input (GND)
89
TEST
In
+5V
90
MA15
—
Image address 15 (NU)
91
MA18
—
Nu
92
MA19
—
Nu
93
RCVRDY1
—
Nu
94
RCVRDY2
—
Nu
95
RC0
—
Remote control encord signal for CPU
96
IRTX
—
I/R output for LED (NU)
97
UASCK
—
I/R serial data shift clock (NU)
98
UARX
—
I/R serial data for CPU (NU)
99
UATX
—
I/R serial data from CPU (NU)
100
VCC
—
+5V
101
GND
—
GND
102
IRRX
—
I/R input from I/R unit (NU)
103
RCI
—
I/R input from I/R unit (NU)
104
DAX1
—
System clock (7.3728MHz)
4 – 7
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