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Sharp XE-A102 Service Manual page 9

Electronic cash register
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4. CPU PORT TABLE
No.
PIN Name
1
P50/A8
2
P51/A9
3
P52/A10
4
P53/A11
5
P54/A12
6
P55/A13
7
P56/A14
8
P57/A15
9
Vss0
10
Vdd0
11
P30
12
P31
13
P32
14
P33
15
P34/SI31
16
P35/SO31
17
P36/SCK31-
18
P20/SI30
19
P21/SO30
20
P22/SCK30-
21
P23/RXD0
22
P24/TXD0
23
P25/ASCK0
24
Vdd1
25
Avss
26
P17/ANI7
27
P16/ANI6
28
P15/ANI5
29
P14/ANI4
30
P13/ANI3
31
P12/ANI2
32
P11/ANI1
33
P10/ANI0
34
Avref
35
Avdd
36
RESET-
37
XT2
38
XT1
39
IC/VPP
40
X2
41
X1
42
Vss1
43
P00/INTP0
44
P01/INTP1
45
P02/INTP2
46
P03/INTP3/ADTRG
47
P70/TI00/TO0
48
P71/TI01
49
P72/TI50/TO50
50
P73/TI51/TO51
51
P74/PCL
52
P75/BUZ
53
P64/RD-
54
P65/WR-
55
P66/WAIT-
56
P67/ASTB
57
P40/AD0
58
P41/AD1
59
P42/AD2
60
P43/AD3
61
P44/AD4
62
P45/AD5
63
P46/AD6
64
P47/AD7
Signal Name
RWND
REWIND MOTOR
DR
To DRAWER
SA2
DISPLAY SEGMENT
SB2
DISPLAY SEGMENT
SC2
DISPLAY SEGMENT
SD2
DISPLAY SEGMENT
SE2
DISPLAY SEGMENT
SF2
DISPLAY SEGMENT
GND
VDD
ST1-
DISPLAY STROBE N-Ch O.D.
ST2-
DISPLAY STROBE N-Ch O.D.
ST3-
DISPLAY STROBE N-Ch O.D.
ST4-
DISPLAY STROBE N-Ch O.D.
ST5
DISPLAY STROBE (H ACTIVE)
NU
(GND via 56k)
NU
(GND via 56k)
SA1
DISPLAY SEGMENT
SB1
DISPLAY SEGMENT
SC1
DISPLAY SEGMENT
SD1
DISPLAY SEGMENT
SE1
DISPLAY SEGMENT
SF1
DISPLAY SEGMENT
VDD
GND
VBAT
BATTERY voltage
NU
RESERVE FOR KEY RETURN
KR6
KEY RETURN
KR5
KEY RETURN
KR4
KEY RETURN
KR3
KEY RETURN
KR2
KEY RETURN
KR1
KEY RETURN
VCC
VDD
RESET-
XT2
32.768Khz Xtal
XT1
32.768Khz Xtal
GND
X2
SYSTEM CLOCK
X1
SYSTEM CLOCK
GND
/POF
POWER OFF
T
From PRINTER
t
From PRINTER
R
From PRINTER
SG1
DISPLAY SEGMENT
SDP1
DISPLAY SEGMENT
SG2
DISPLAY SEGMENT
SDP2
DISPLAY SEGMENT
NU
BUZ
BUZZER
MTR
To PRINTER
TRG
To PRINTER
MSL1
MODEL SELECT1
MSL2
MODEL SELECT2
KST1
KEY STROBE
KST2
KEY STROBE
KST3
KEY STROBE
KST4
KEY STROBE
KST5
KEY STROBE
KST6
KEY STROBE
KST7
KEY STROBE
KST8
KEY STROBE
XE-A102 HARDWARE DESCRIPTION
Description
Output/Input
– 7 –
Initial state
O
L
O
L
O
L
O
L
O
L
O
L
O
L
O
L
O
H
O
H
O
H
O
H
O
L
I
I
O
L
O
L
O
L
O
L
O
L
O
L
I
I
I
I
I
I
I
I
I
I
I
I
O
L
O
L
O
L
O
L
O
L
O
L
O
L
O
L
I
I
O
L
O
L
O
L
O
L
O
L
O
L
O
L
O
L
When STBY
O/L
O/L
O/L
O/L
O/L
O/L
O/L
O/L
I
I
I
I
O/L
I
I
O/L
O/L
O/L
O/L
O/L
O/L
I
I
I
I
I
I
I
I
I
I
I
I
O/L
O/L
O/L
O/L
O/L
O/L
O/L
O/L
I
I
O/L
O/L
O/L
O/L
O/L
O/L
O/L
O/L

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