Read Sharp XE-A303 (serv.man4) Service Manual online
XE-A303 (V)
HARDWARE DESCRIPTION
– 7 –
P25
90
O
P2_5/A5
A5
H
Out L
ADDRESS BUS
P26
89
O
P2_6/A6
A6
H
Out L
ADDRESS BUS
P27
88
O
P2_7/A7
A7
H
Out L
ADDRESS BUS
P30
86
O
P3_0/A8
A8
H
Out L
ADDRESS BUS
P31
79
O
P3_1/A9
A9
H
Out L
ADDRESS BUS
P32
78
O
P3_2/A10
A10
H
Out L
ADDRESS BUS
P33
77
O
P3_3/A11
A11
H
Out L
ADDRESS BUS
P34
76
O
P3_4/A12
A12
H
Out L
ADDRESS BUS
P35
75
O
P3_5/A13
A13
H
Out L
ADDRESS BUS
P36
74
O
P3_6/A14
A14
H
Out L
ADDRESS BUS
P37
73
O
P3_7/A15
A15
H
Out L
ADDRESS BUS
P40
72
O
P4_0/A16
A16
H
Out L
ADDRESS BUS
P41
71
O
P4_1/A17
A17
H
Out L
ADDRESS BUS
P42
70
O
P4_2/A18
A18
H
Out L
ADDRESS BUS
P43
69
O
P4_3/A19
A19
H
Out L
ADDRESS BUS
P44
68
O
P4_4/#CS0
#CS0
H
Out H
P45
67
O
P4_5/#CS1
#CS1
H
Out L
P46
66
O
P4_6/#CS2
#CS2
H
Out H
P47
65
O
P4_7/#CS3
#CS3
H
Out L
P50
61
O
P5_0/#WRL/#WR
#WR
H
Out L
WRITE
P51
60
O
P5_1/#WRH/#BHE
KISYU
L
Out L
P52
59
O
P5_2/#RD
#RD
H
Out L
READ
P53
58
O
P5_3/BCLK
BCLK
H
Out H
MONITOR
P54
53
O
P5_4/#HLDA
#HLDA
L
Out L
P55
52
I
P5_5/#HOLD
#EPM
In
P56
51
O
P5_6/ALE
ALE
L
Out L
P57
50
I
P5_7/#RDY/
CLKOUT
#RDY
In
P60
45
O
P6_0/#CTS0/#RTS0
PESON
L
Out L
PAPER END SENSOR ON/OFF
P61
44
O
P6_1/CLK0
PCLK0
L
Out L
DATA TRANSMISSION CLOCK
P62
43
O
P6_2/RXD0/SCL0
VHCOM0
L
Out L
HEAD VOLTAGE ON
P63
42
O
P6_3/TXD0/SDA0
PDAT0
L
Out L
PRINT DATA
P64
41
I
P6_4/#CTS1/#RTS1/
#CTS0/CLKS1
BUSY
In
V4/V6 DISCRIMINATE
(V4 = L / V7 = H)
(V4 = L / V7 = H)
P65
40
O
P6_5/CLK1
SCLK
H
Out L
D/B
P66
38
I
P6_6/RXD1/SCL1
RXD
Out L
D/B
P67
36
O
P6_7/TXD1/SDA1
TXD
H
Out L
D/B
P70
35
O
P7_0/TXD2/SDA2
#TA0OUT
PDAT1
L
Out L
PRINT DATA
P71
34
O
P7_1/RXD2/SCL2/
TA0IN/#TB5IN
VHCOM1
L
Out L
HEAD VOLTAGE ON
P72
33
O
P7_2/CLK2/TA1OUT/
V
PCLK1
L
Out L
DATA TRANSMISSION CLOCK
P73
32
O
P7_3/#CTS2/#RTS2/
TA1IN/# V
LCDCS#
H
Out L
LCD SELECT
P74
31
I
P7_4/TA2OUT/W
HUS0
In
HEAD UP SENSOR
P75
30
I
P7_5/TA2IN/#W
HUS1
In
HEAD UP SENSOR
P76
29
I
P7_6/TA3OUT
PES0
In
PAPER END SENSOR
P77
28
I
P7_7/TA3IN
PES1
In
PAPER END SENSOR
P80
27
O
P8_0/TA4OUT/U
BUZZER
L
Out L
BUZZER DRIVE
P81
26
O
P8_1/TA4IN/#U
RESUSB#
L
Out L
USB CONTROLLER RESET
P82
25
I
P8_2/#INT0
POFF#
In
POFF SIGNAL
P83
24
I
P8_3/#INT1
DREQUSB#
In
DREQ USB
P84
23
I
P8_4/#INT2/ZP
INTUSB#
In
INTERRUPT USB
P85
22
I
P8_5/#MNI
NMI#
In
P86
16
I
P8_6/XCOUT
XCOUT
In
SUB CLOCK
P87
15
I
P8_7/XCIN
XCIN
In
SUB CLOCK
P90
10
I
P9_0/TB0IN/CLK3
KR0
Out L
KEY RETURN SIGNAL
P91
9
I
P9_1/TB1IN/SIN3
KR1
Out L
KEY RETURN SIGNAL
P92
8
I
P9_2/TB2IN/SOUT3
KR2
Out L
KEY RETURN SIGNAL
PORT
PIN No.
I/O
PIN NAME
SIGNAL NAME
INTIAL VALUE
OFF MODE
FUNCTION
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