Read Sharp XE-A213 (serv.man4) Service Manual online
XE-A203V/A213V
HARDWARE DESCRIPTION
– 12 –
10-2. HEAD CONTROL
HEAD: All 288dot width 0.167mm/dot (6dot/mm)
Related port
10-3. WINDING MOTOR CONTROL
The following port is set to “H” the motor is controlled.
Related port
10-4. PAPER EMPTY DETECTION
Related port
10-5. PLATEN OPEN
Related port
10-6. HEAD THERMISTOR
Related port
11. A/D CONVERSION
Related port
12. CPU PORT TABLE
PORT
Signal name
Remark
P65
CLK1
PCLK
Printer head clock
P66
RXD1
PLATCH
Printer head latch
P67
TXD1
PDATA
Printer head data
P70
TXD2
PSTB1#
Printer head strobe
P71
RXD2
PSTB2#
Printer head strobe
PSTB1#:1~144dot:All 144dot
Total 288 dot
PSTB2#:145~288dot:All 144dot
PORT
Signal name
Remark
P103
AN3
PMOTOR
Winding Motor
PORT
Signal name
Remark
P93
Adtrg#
PEND
Paper empty signal
PORT
Signal name
Remark
P92
SOF#
HDUP
Head up (platen open)
PORT
Signal name
Remark
P101
AN1
HTEMP
Printer head thermistor
PORT
Signal name
Remark
P100
AN0
VPRN
Printer power voltage
P101
AN1
HTEMP
Printer head thermistor (already-
stated)
stated)
P102
AN2
VBAT
Battery voltage
PIN
SYMBOL
I/O
External
P0
0
86
D0
D0
Data Bus
I/O
Vcc-PU
1
85
D1
D1
Data Bus
I/O
Vcc-PU
2
84
D2
D2
Data Bus
I/O
Vcc-PU
3
83
D3
D3
Data Bus
I/O
Vcc-PU
4
82
D4
D4
Data Bus
I/O
Vcc-PU
5
81
D5
D5
Data Bus
I/O
Vcc-PU
6
80
D6
D6
Data Bus
I/O
Vcc-PU
7
79
D7
D7
Data Bus
I/O
Vcc-PU
P1
0
78
D8
ROMBNK
ROM Bank
Select
Select
O
-
1
77
D9
RAMBNK
RAM Bank
Select
Select
O
-
2
76
D10
NC
I
GND-PD
3
75
D11
FRDY
FlashReady
I
Vbb-PU
4
74
D12
KS0
Key strobe
O
Vcc-PU
5
73
D13
KS1
Key strobe
O
Vcc-PU
6
72
D14
KS2
Key strobe
O
Vcc-PU
7
71
D15
KS3
Key strobe
O
Vcc-PU
P2
0
70
A0
A0
Address Bus
O
-
1
69
A1
A1
Address Bus
O
-
2
68
A2
A2
Address Bus
O
-
3
67
A3
A3
Address Bus
O
-
4
66
A4
A4
Address Bus
O
-
5
65
A5
A5
Address Bus
O
-
6
64
A6
A6
Address Bus
O
-
7
63
A7
A7
Address Bus
O
-
P3
0
61
A8
A8
Address Bus
O
-
1
59
A9
A9
Address Bus
O
-
2
58
A10
A10
Address Bus
O
-
3
57
A11
A11
Address Bus
O
-
4
56
A12
A12
Address Bus
O
-
5
55
A13
A13
Address Bus
O
-
6
54
A14
A14
Address Bus
O
-
7
53
A15
A15
Address Bus
O
-
P4
0
52
A16
A16
Address Bus
O
-
1
51
A17
A17
Address Bus
O
-
2
50
A18
A18
Address Bus
O
-
3
49
A19
A19
Address Bus
O
-
4
48
CS0#
CS0#
FLASH mem-
ory &SRAM
ory &SRAM
O
Vbb-PU
5
47
CS1#
CS1#
REAR DISP
& KEY
RETURN
& KEY
RETURN
O
Vcc-PU
6
46
CS2#
CS2#
SRAM
O
Vbb-PU
7
45
CS3#
CS3#
Front LCD
data transmis-
sion
data transmis-
sion
O
Vcc-PU
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