Sharp PC-1261 Service Manual page 4

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Pin Signal
In/Out Function
(standby - power off)
No. Name
41
H10 Out
LCD backplate signal, high impedance during standby, but 4 level pulse issued during displaying.
42
H11 Out
LCD backplate signal, high impedance during standby, but 4 level pulse issued during displaying.
43 H12
Out
LCD backplate signal, high impedance during standby, but 4 level pulse issued during displaying.
44 H13 Out
LCD backplate signal, high impedance during standby, but 4 level pulse issued during displaying.
45 H14 Out
LCD backplate signal, high impedance during standby, but 4 level pulse issued during displaying.
46
H15
-
Not used because the display unit of this model is operates under 1/14 duty.
47
H16
-
Not used because the display unit of this model is operates under 1/14 duty.
48
VB In
LCD power supply, high during standby and VB when clock is at stop.
49 VDiS In
LCD power supply, high during standby and low when clock is at stop.
50
vcc
In LCD power supply, normally low.
51
voe
Out LCD power supply, high during standby and low when clock is at stop.
52 VGG In
Power supply, normally low
53
08 In/Out Data bus line, normally high impedance
54 o7 In/Out
Data bus line, normally high impedance
55 06 In/Out Data bus line, normally high impedance
56 o5 In/Out Data bus line, normally high impedance
57 o4 In/Out
Data bus line, normally high impedance
58 o3 In/Out Data bus line, normally high impedance
59 o2 In/Out Data bus line, normally high impedance
60 o1 In/Out Data bus line, normally high impedance
61 Fo5
Out
32K ROM chip enable
62 Fo4
Out Option RAM chip enable
63 Fo3 Out LCD driver LSI (DISPLAY 1) chip enable
64 Fo2 Out Data out (Dout) peripheral data out port output
65
Fo1 Out
BUSY (1/F) out port output
66 Bo8 Out LCD driver LSI (DISPLAY 2) chip enable
67 Bo7 Out
(A14) address bus line, high during standby
68 Bo6 Out (A 13) address bus line, high during standby
69 Bo5 Out (A 12) address bus line, high during standby
70 Bo4 Out (A11) address bus line, high during standby
71 Bo3
Out (A10) address bus line, high during standby
72
Bo2 Out (A9) address bus line, high during standby
73 Bo1
Out (AB) address bus line, high during standby
74 Ao8 Out
(A7) address bus line, high during standby
75
Ao7 Out (A6) address bus line, high during standby
76 Ao6 Out (A5) address bus line, high during standby
77
Ao5 Out
(A4) address bus line, high during standby
78
Ao4 Out
(A3) address bus line, high during standby
79 Ao3 Out
(A2) address bus line, high during standby
80 Ao2 Out
(A1) address bus line, high during standby
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PC-1260
PC-1261