Read Sharp R-770AM Service Manual online
12
770AM -
Pin No.
Signal
I/O
Description
45
P23
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G1 line keys on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G1 line keys on matrix is touched.
46-48
P22-P20
IN/OUT
Terminal not used.
49-50
P17-P16
IN/OUT
Terminal not used.
51
SEG39
OUT
Terminal not used.
60
SEG30
61
SEG29
OUT
Segment data signal.
Connected to LCD.
Connected to LCD.
90
SEG 0
The relation between signals are as follows:
LSI signal (Pin No.)
LCD (Pin No.)
LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (90) ................................ 1
SEG15 (75) ........................... 29
SEG 1 (89) ................................ 2
SEG16 (74) ........................... 28
SEG 2 (88) ................................ 3
SEG17 (73) ........................... 27
SEG 3 (87) ................................ 4
SEG18 (72) ........................... 26
SEG 4 (86) ................................ 5
SEG19 (71) ........................... 25
SEG 5 (85) ................................ 6
SEG20 (70) ........................... 24
SEG 6 (84) ................................ 7
SEG21 (69) ........................... 11
SEG 7 (83) ................................ 8
SEG22 (68) ........................... 23
SEG 8 (82) ................................ 9
SEG23 (67) ........................... 22
SEG 9 (81) .............................. 10
SEG24 (66) ........................... 12
SEG10 (80) ............................. 34
SEG25 (65) ........................... 13
SEG11 (79) ............................. 33
SEG26 (64) ........................... 14
SEG12 (78) ............................. 32
SEG27 (63) ........................... 15
SEG13 (77) ............................. 31
SEG28 (62) ........................... 16
SEG14 (76) ............................. 30
SEG29 (61) ........................... 17
91
VCC
IN
Connected to GND.
92
VREF
IN
Connected to GND.
93
AVSS
IN
Connected to VC.
94
COM3
OUT
Common data signal: COM3.
Connected to LCD (Pin No. 21).
Connected to LCD (Pin No. 21).
95
COM2
OUT
Common data signal: COM2.
Connected to LCD (Pin No. 20).
Connected to LCD (Pin No. 20).
96
COM1
OUT
Common data signal: COM1.
Connected to LCD (Pin No. 19).
Connected to LCD (Pin No. 19).
97
COM0
OUT
Common data signal: COM0.
Connected to LCD (Pin No. 18).
Connected to LCD (Pin No. 18).
98-99
VL3-VL2
IN
Power source voltage input terminal.
Standard voltage for LCD.
Standard voltage for LCD.
100
C2
IN
Terminal not used.
TOUCH CONTROL / DESCRIPTION OF LSI
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