Sharp ER-A450T Service Manual page 16

Pin Signal In/
No. name Out
107 MCR2 — Nu
108 WAIT Out Wait request signal
External wait control input signal (NU)
109 EXWAIT In
+5V
110 RA18 Out Nu
111 RA17 Out Nu
112 GND — GND
113 RA16 Out Nu
114 RA15 Out Nu
115 RDO Out Expansion RD signal
116 WRO Out Expansion WR signal
117 EXINT3 In RS232C /CD interrupt
118 EXINT2 In Option PWB (PULL UP)
119 EXINT1 In RS232C /CI interrupt
120 EXINT0 In Option PWB (PULL UP)
Chip select base signal for expansion
121 OPTCS Out
option
122 ROS1 Out ROM 1 chip select signal
123 ROS2 Out ROM 2 chip select signal (NU)
124 RAS2 Out RAM 2 chip select signal
125 RAS1 Out RAM 1 chip select signal
126 RJRST In Printer reset signal
127 RJTMG In FOR TPRC (NU) +5V
128 DT4 Out Printer dot signal 4 (NU)
129 DT3 Out Printer dot signal 3 (NU)
130 DT2 Out Printer dot signal 2 (NU)
131 DT1 Out Printer dot signal 1 (NU)
132 GND — GND
133 DT7 Out Printer dot signal 7 (NU)
134 DT6 Out Printer dot signal 6 (NU)
135 DT5 Out Printer dot signal 5 (NU)
136 MTD Out Printer motor drive signal (NU)
137 MTD Out Printer motor drive signal (NU)
138 DOT9 Out Printer dot signal 9 (NU)
139 DOT8 Out Printer dot signal 8 (NU)
140 SYNC — Nu (+5V)
141 ASKRX — I/R input from I/R unit (NU) Pull-up
142 VCC — +5V
143 GND — GND
144 — — Nu
145 RAS3 Out Nu
Printer motor lock detection signal (NU)
146 RJMTR In
GND
147 SLMTD Out Nu
148 SLMTS Out Nu
149 SLMTR In GND
150 HTS2 Out Serial output to FMC unit
151 SCK2 Out Serial clock to FMC unit
152 STH2 In Serial input to FMC unit
153 — — Nu
154 — — Nu
155 — — Nu
156 — — Nu
157 — — Nu
158 LCDWT IN TPRC wait signal
159 DOTEN Out Dot drive enable signal (Nu)
160 RASP — Nu
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
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