Sharp ER-A450 Service Manual page 15

Pin Signal In/
No. name Out
106 — Nu
MCR1
107 — Nu
MCR2
108 Out Wait request signal
WAIT
External wait control input signal (NU)
109 In
EXWAIT
+5V
110 Out Nu
RA18
111 Out Nu
RA17
112 — GND
GND
113 Out Nu
RA16
114 Out Nu
RA15
115 Out Expansion RD signal
RDO
116 Out Expansion WR signal
WRO
117 In RS232C /CD interrupt
EXINT3
118 In Option PWB (PULL UP)
EXINT2
119 In RS232C /CI interrupt
EXINT1
120 In Option PWB (PULL UP)
EXINT0
Chip select base signal for expansion
121 Out
OPTCS
option
122 Out ROM 1 chip select signal
ROS1
123 Out ROM 2 chip select signal (NU)
ROS2
124 Out RAM 2 chip select signal
RAS2
125 Out RAM 1 chip select signal
RAS1
126 In Printer reset signal
RJRST
127 In FOR TPRC (NU) +5V
RJTMG
128 Out Printer dot signal 4 (NU)
DT4
129 Out Printer dot signal 3 (NU)
DT3
130 Out Printer dot signal 2 (NU)
DT2
131 Out Printer dot signal 1 (NU)
DT1
132 — GND
GND
133 Out Printer dot signal 7 (NU)
DT7
134 Out Printer dot signal 6 (NU)
DT6
135 Out Printer dot signal 5 (NU)
DT5
136 Out Printer motor drive signal (NU)
MTD
137 Out Printer motor drive signal (NU)
MTD
138 Out Printer dot signal 9 (NU)
DOT9
139 Out Printer dot signal 8 (NU)
DOT8
140 — Nu (+5V)
SYNC
141 — I/R input from I/R unit (NU) Pull-up
ASKRX
142 — +5V
VCC
143 — GND
GND
144 — — Nu
145 Out Nu
RAS3
Printer motor lock detection signal (NU)
146 In
RJMTR
GND
147 Out Nu
SLMTD
148 Out Nu
SLMTS
149 In GND
SLMTR
150 Out Serial output to FMC unit
HTS2
151 Out Serial clock to FMC unit
SCK2
152 In Serial input to FMC unit
STH2
153 — — Nu
154 — — Nu
155 — — Nu
156 — — Nu
157 — — Nu
158 IN TPRC wait signal
LCDWT
159 Out Dot drive enable signal (Nu)
DOTEN
160 — Nu
RASP
Function
Option
4 – 8
2-3. CKDC8
1) Pin configulation
DP 1
SA 2
SB 3
SC 4
SD 5
SE 6
SF 7
SG 8
CKDC8
GND 9
VDD 10
KR4 11
KR10 12
KR11 13
NU 14
HTS 15
STH 16
2) Pin assignment (CKDC8)
Pin SIGNAL
SYMBOL
No. NAME
1 DP DP
2 A SA
3 B SB
4 C SC
5 D SD
6 E SE
7 F SF
8 G SG
9 VSS0 GND
10 VDD0 VDD
11 KR4 KR4
12 KR10 KR10
13 KR11 KR11
14 KR8 NU
15 HTS HTS
16 STH STH
17 /SCK /SCK
18 ST0 ST0
19 ST1 ST1
20 ST2 ST2
21 ST3 ST3
22 ST4 ST4
23 ST5 ST5
24 VDD1 VDD
25 AXSS GND
26 KR9 NU
27 KR0 KR0
28 KR1 KR1
29 KR2 KR2
30 KR3 KR3
31 KR5 KR5
32 KR6 KR6
48 ST7
47 ST6
46 /RESETS
45 /SHEN
44 ERC
43 LDRQ
42 GND
41
40
39 GND
38
37
36 /RES0
35 VDD
34 GND
33 KR7
IN/
FUNCTION
OUT
OUT DISPLAY SEGMENT Dp
OUT DISPLAY SEGMENT a
OUT DISPLAY SEGMENT b
OUT DISPLAY SEGMENT c
OUT DISPLAY SEGMENT d
OUT DISPLAY SEGMENT e
OUT DISPLAY SEGMENT f
OUT DISPLAY SEGMENT g
GND
VDD
IN KEY RETURN 4
KEY RETURN (feed clerk
IN
MRS sw)
IN KEY RETURN (MODE sw)
IN GND
IN
OUT
IN SHIFT CLOCK
OUT KEY STROBE 0
OUT KEY STROBE 1
OUT KEY STROBE 2
OUT KEY STROBE 3
OUT KEY STROBE 4
OUT KEY STROBE 5
VDD
GND
GND
IN KEY RETURN 0
IN KEY RETURN 1
IN KEY RETURN 2
IN KEY RETURN 3
IN KEY RETURN 5
IN KEY RETURN 6