Sharp ER-A470 (serv.man2) Service Manual ▷ View online
2) Block diagram
Fig. 2-4
MTD
MTD
RJMTR
SLMTD
SLMTS
SLMTR
SLMTD
TXDI
SCKI
RXDI
HTS1
SCK1
STH1
HTS2
SCK2
STH2
ROS1
ROS2
RAS1
RAS2
RAS3
OPTCS
AS
RD
WR
RDO
WRO
Φ
RESET
RES
VRESC
POFF
MD0
MD1
MD1
WAIT
RJRST
SLRST
*PRST
RJTMG
SLTMG
PTMG
INT4
INT1
INT2
INT3
EXINT0
EXINT1
EXINT2
EXINT3
SD
T1
~7
T1
~7
DT
1
1
~
9
TEST
IRQ0
A23~A0
SSPRQ
SL
F
F
SL
R
R
S
VF
RF
JF
F
CUT
PC
U
U
T
STAM
P
TR
G
G
I
TR
G
G
TR
G
G
DO
T
T
E
N
IRLON
D0~D7
Φ
Address decode
External CS
Internal CS
Internal CS
RASEL
Image
control
Image
control
SSP comparison register
BAR.
Buffer
Read/write
control
control
Divider
CHS
serial select
serial select
Multiplexer
WAIT
control
control
CAPS
select
select
Print gate
Print pulse control
Print mode PMD
INTO
control
control
Printer control port
Motor
drive
drive
* Output selection with CAPS.
PRST/PTMG.
PRST/PTMG.
EXWAIT
I/R Control
IRTX
IRRX
RCI
ASKRX
– 16 –
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
Interrupt signal (Key interrupt request)
15
HTS1
Out
8 bit serial port output
16
SCK1
Out
Serial port shift clock output
17
STH1
In
8 bit serial port input
18
RAS VZ
—
Chip select (NU)
19
—
—
Nu
20
VCC
—
+5V
21
GND
—
GND
22
INTMCR
—
Interrupt (NU)
23
VRESC
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
SDT7
Out
Slip printer printhead drive signal (dot7)
(NU)
(NU)
31
SDT6
Out
Slip printer printhead drive signal (dot6)
(NU)
(NU)
32
SDT5
Out
Slip printer printhead drive signal (dot5)
(NU)
(NU)
33
GND
—
GND
34
SDT4
Out
Slip printer printhead drive signal (dot4)
(NU)
(NU)
35
SDT3
Out
Slip printer printhead drive signal (dot3)
(NU)
(NU)
36
SDT2
Out
Slip printer printhead drive signal (dot2)
(NU)
(NU)
37
SDT1
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/0
Data bus 4
44
D5
I/0
Data bus 5
45
D6
I/0
Data bus 6
46
D7
I/0
Data bus 7
47
SPRQ
Out
SSP interrupt request to CPU
48
RESET
In
MPCA reset
49
INT2
In
Interrupt signal (Nu)
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
INT4
In
Interrupt signal (NU)
86
IPLON
In
To option connector
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
97
UASCK
—
I/R serial data shift clock
98
UARX
—
I/R serial data for CPU
99
UATX
—
I/R serial data from CPU
100
VCC
—
+5V
101
GND
—
GND
102
IRRX
—
I/R input from I/R unit
103
RCI
—
I/R input from I/R unit
104
DAX1
—
System clock (7.3728MHz)
– 17 –
Pin
No.
Signal
name
In/
Out
Function
105
DAX2
—
Nu
106
MCR1
—
Nu
107
MCR2
—
Nu
108
WAIT
Out
Wait request signal
109
EXWAIT
In
External wait control input signal
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
Option
116
WRO
Out
Expansion WR signal
117
EXINT3
In
Expansion interruption signal 3
Option
118
EXINT2
In
Expansion interruption signal 2
119
EXINT1
In
Expansion interruption signal 1
120
EXINT0
In
Expansion interruption signal 0
121
OPTCS
Out
Chip select base signal for expansion
option
option
122
ROS1
Out
ROM 1 chip select signal
123
ROS2
Out
ROM 2 chip select signal
124
RAS2
Out
RAM 2 chip select signal
125
RAS1
Out
RAM 1 ship select signal
126
RJRST
In
Printer reset signal
127
RJTMG
In
Printer timing signal
128
DT4
Out
Printer dot signal 4
129
DT3
Out
Printer dot signal 3
130
DT2
Out
Printer dot signal 2
131
DT1
Out
Printer dot signal 1
132
GND
—
GND
133
DT7
Out
Printer dot signal 7
134
DT6
Out
Printer dot signal 6
135
DT5
Out
Printer dot signal 5
136
MTD
Out
Printer motor drive signal
137
MTD
Out
Printer motor drive signal
138
DOT9
—
Printer dot signal 9 (NU)
139
DOT8
—
Printer dot signal 8 (NU)
140
SYNC
—
Nu (+5V)
141
ASKRX
—
I/R input from I/R unit
142
VCC
—
+5V
143
GND
—
GND
144
—
—
Nu
145
RAS3
Out
Nu
146
RJMTR
In
Printer motor lock detection signal (NU)
147
SLMTD
In
Nu
148
SLMTS
In
Nu
149
SLMTR
In
GND
150
HTS2
Out
Nu
151
SCK2
Out
Nu
152
STH2
In
Nu
153
—
—
Nu
154
—
—
Nu
155
—
—
Nu
156
—
—
Nu
157
—
—
Nu
158
LCDWT
—
Nu
159
DOTEN
Out
Dot drive enable signal
160
RASP
—
Nu
2-3. CKDC6 (HD404728A91FS)
1) General description
The CKDC6 is a 4-bit microcomputer developed for the ER-A460/
A470 and provides functions to control the real-time clock, keys, and
displays. The basic functions of the CKDC6 are shown below.
A470 and provides functions to control the real-time clock, keys, and
displays. The basic functions of the CKDC6 are shown below.
Keys:
The CKDC6 is capable of controlling a maximum of 256
momentary keys. (Sharp 2-key rollover control)
Simultaneous scanning of key and switch
(When a key is scanned, the state of a mode and clerk
switch is also buffered. The host can scan the state of
switch together with the key entry data at the same time
the key is scanned.)
momentary keys. (Sharp 2-key rollover control)
Simultaneous scanning of key and switch
(When a key is scanned, the state of a mode and clerk
switch is also buffered. The host can scan the state of
switch together with the key entry data at the same time
the key is scanned.)
Switches:
Mode switch with 14 positions maximum
8-bit clerk (cashier) switch
2-bit feed switch
1-bit receipt on/off switch
1-bit option switch
4-bit general-purpose switch (1-bit is used for keyboard
select)
8-bit clerk (cashier) switch
2-bit feed switch
1-bit receipt on/off switch
1-bit option switch
4-bit general-purpose switch (1-bit is used for keyboard
select)
Displays:
16-column dot display
12-column 7-segment display (column digit selectable)
All column blink controlled for the dot and 7-segment
display decimal point and indicators
Programmable patterns for 7-segment display:
Four patterns
Internal driver for 7-segment display
12-column 7-segment display (column digit selectable)
All column blink controlled for the dot and 7-segment
display decimal point and indicators
Programmable patterns for 7-segment display:
Four patterns
Internal driver for 7-segment display
Buzzer:
Single tone control
Clock:
Year, month, day of month, day of week, hour, minute
Alarm:
Hour, minute
Interrupt request (event control):
Detection of key input, switch position change, alarm
issue, and counter overflow
issue, and counter overflow
– 18 –
Fig. 2-5
2) Pin assignment
Pin
No.
Port
I/O
RESET
State
Signal
name
I/O
Notes
PULL
−
UP
−
DOWN
1
R0
1
I/O
H-Z
SB
O
DB4 : SEG-B
PULL-DOWN
2
R0
2
I/O
H-Z
SC
O
DB4 : SEG-C
PULL-DOWN
3
R0
3
I/O
H-Z
SD
O
DB4 : SEG-D
PULL-DOWN
4
R1
0
I/O
H-Z
SE
O
DB4 : SEG-E
PULL-DOWN
5
R1
1
I/O
H-Z
SF
O
DB4 : SEG-F
PULL-DOWN
6
R1
2
I/O
H-Z
SG
O
DB4 : SEG-G
PULL-DOWN
7
R1
3
I/O
H-Z
O
DB7 : 7SEG COM
PULL-DOWN
8
R2
0
I/O
H-Z
O
DB2 : DOT DP
PULL-DOWN
9
R2
1
I/O
H-Z
O
DB3 : DOT COM
PULL-DOWN
10
R2
2
I/O
H-Z
DP
O
DB5 : 7SEG DP
PULL-DOWN
11
R2
3
I/O
H-Z
ID
O
DB5 : 7SEG ID
PULL-DOWN
12
RA
0
I
I
MODR
I
MODE RETURN
PULL-UP
13
RA
1
I
I
CFSR
I
CLEARK, FEED,
SWITCH RETURN
SWITCH RETURN
PULL-UP
14
R3
0
I/O
H-Z
KEX0
O
KEY EXCHANGE0
15
R3
1
I/O
H-Z
KEX1
O
KEY EXCHANGE1
16
R3
2
I/O
H-Z
NU
O
GND
17
R3
3
I/O
H-Z
NU
O
GND
18
R5
0
I/O
I
ST0
O
KEY SCAN ST0
19
R5
1
I/O
I
ST1
O
KEY SCAN ST1
20
R5
2
I/O
I
ST2
O
KEY SCAN ST2
21
R5
3
I/O
I
ST3
O
KEY SCAN ST3
Pin
No.
Port
I/O
RESET
State
Signal
name
I/O
Notes
PULL
−
UP
−
DOWN
22
R6
0
/INT0
I/O
I
POFF
I
P-OFF
23
R6
1
/INT1
I/O
I
STOP
I
STOP
PULL-UP
24
R6
2
/INT2
I/O
I
DDIG
O
+5V
25
R6
3
/INT3
I/O
I
DCS
O
DOT DISPLAY CONT./CS
26
Vcc
VCC
+5V
27 R4
0
/SCK I/O
I
SCK
I
SCK
28
R4
1
/SI
I/O
I
HTS
I
HTS
29
R4
2
/S0
I/O
I
STH
O
STH
30
R4
3
/PWM
I/O
I
SDISP
I
+5V
31
R7
0
/BUZZ
I/O
I
BUZZ
O
BUZZER
32
R7
1/
SCK2
I/O
I
DSCK
O
DOT DISP CONT.
SCK
SCK
33
R7
2
/SI2 I/O
I
SRES
O
SYSTEM RESET
PULL-DOWN
34
R7
3
/S02 I/O
O
DS0
O
DOT DISP CONT.
SO
SO
35
R8
0
I/O
O
SHEN
O
SHEN
36
R8
1
I/O
O
KRQ
O
KEY REQUEST
37
R9
0
I
I
KR0
I
KEY RETURN 0
38
R9
1
I
I
KR1
I
KEY RETURN 1
39
R9
2
I
I
KR2
I
KEY RETURN 2
40
R9
3
I
I
KR3
I
KEY RETURN 3
41
RESET
I
I
CKDCR
I
CKDC IV RESET
42
OSC2
4.19 MHz X’tal
43
OSC1
44
GND
GND
45
CL1
32.768 KHz OSC
IRQ
SHEN
STH
HTS
SCK
POFF
STOP
SRES
SHEN
STH
HTS
SCK
POFF
STOP
SRES
CKDCR
HOST
SYSTEM
SYSTEM
7SEG-DISPLAY 7DIG
DOT-DISPLAY 16DIG
G1~
G7
SA~
SG
P0,
1,
4
CKDC 6
P2,3
D
IG00
D
IG15
S
EG00
S
EG15
DOT DISP CONT.
M66004FP
M66004FP
SRES,DCS,DSCK,DSO
ST0~3
KEX0,1
DECODER
LS138
LS138
DECODER
LS138
LS138
KEY BOARD
MAX. 244key
MAX. 244key
DECODER
LS153
LS153
DECODER
LS153
LS153
D
ISPSL
SKR
O
Q
BUZZ
BUZZER
CSFR
MODR
MODR
KR
0~
3
– 19 –
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