Sharp R-350B Service Manual page 17

Pin No. Signal I/O
12 RESET IN
13 MD0 IN
14 P20 OUT
15 P21 OUT
16 P22 OUT
17 P23 OUT
18 P24 OUT
19 P25 OUT
20 P26 OUT
21 P27 OUT
22 P30 OUT
23 P31 OUT
24 P32 OUT
25-29 P33-P37 OUT
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to
"L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H" level.
Connected to GND.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G8 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G7 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G6 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G5 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G4 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G3 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G2 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8 - AN11 terminal while
one of G1 line keys on key matrix is touched.
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
Terminal not used.
Common data signal: COM5.
Connected to LCD signal COM5 (Pin No. 37)
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.)
P33 (25) .................................. SEG32 (38)
P34 (26) .................................. SEG33 (39)
P35 (27) .................................. SEG34 (40)
P36 (28) .................................. SEG35 (41)
P37 (29) .................................. SEG36 (42)
SEG 1 (39) .................................. SEG1 (1)
SEG 2 (40) .................................. SEG2 (2)
SEG 3 (41) .................................. SEG3 (3)
SEG 4 (42) .................................. SEG4 (4)
SEG 5 (43) .................................. SEG5 (5)
SEG 6 (44) .................................. SEG6 (6)
SEG 7 (45) .................................. SEG7 (7)
SEG 8 (46) .................................. SEG8 (8)
SEG 9 (47) .................................. SEG9 (9)
SEG 10 (48) ............................ SEG10 (10)
SEG 11 (49) ............................ SEG11 (11)
SEG 12 (50) ............................ SEG12 (12)
SEG 13(51) ............................. SEG13 (13)
SEG 14(52) ............................. SEG14 (14)
SEG 15(53) ................. SEG15 (15 and 32)
SEG 16(54) ............................. SEG16 (16)
SEG 17(55) ............................. SEG17 (17)
SEG 18 (56) ............................ SEG18 (18)
Description
0.12 sec.
A
2.4 sec.
B
LCD (Pin No.) LSI signal (Pin No.)
SEG 19 (57) .......................... SEG 19 (19)
SEG 20 (58) .......................... SEG 20 (20)
SEG 21 (59) .......................... SEG 21 (21)
SEG 22 (60) .......................... SEG 22 (22)
SEG 23 (61) .......................... SEG 23 (23)
SEG 24 (62) .......................... SEG 24 (24)
SEG 25 (63) .......................... SEG 25 (25)
SEG 26 (64) .......................... SEG 26 (26)
SEG 27 (65) .......................... SEG 27 (27)
SEG 28 (66) .......................... SEG 28 (28)
SEG 29 (67) .......................... SEG 29 (29)
SEG 30 (68) .......................... SEG 30 (30)
SEG 31 (69) .......................... SEG 31 (31)
SEG 32 (70) .......................... SEG 37 (43)
SEG 33 (71) .......................... SEG 38 (44)
SEG 34 (72) .......................... SEG 39 (45)
SEG 35 (73) .......................... SEG 40 (46)
SEG 36 (74) .......................... SEG 41 (47)
SEG 37 (75) .......................... SEG 42 (48)
SEG 38 (76) ......................... SEG 43 (49)
SEG 39 (77) ......................... SEG 44 (50)
SEG 40 (78) ......................... SEG 45 (51)
15
R-350B
H : GND
L : -5V
H : GND
L : -5V
LCD (Pin No.)