XE-A102 (serv.man2). Service Manual - Sharp ECR Service Manual (repair manual). Page 9

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