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TOUCH CONTROL /
Pin No.
Signal
19-20
P47-P46
21
P45
22
P44
23
INT1
24
INT0
25
P41
26
P40
27
P77
28
P76
29
P75
30
P74
31-33
P73-P71
34
P70
35
RESET
36
XCIN
37
XCOUT
38
XIN
39
XOUT
40
VSS
41
P27
42
P26
43
P25
DESCRIPTION OF LSI
I/O
IN/OUT
Terminal not used.
OUT
Back light driving signal.
To change the brightness of the back light (Light emitting diodes LD1 - LD5). The
square waveform voltage is delivered to the back light driving circuit.
IN/OUT
Terminal not used.
IN
Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pluse signals. And
pulse signals are input into INT1.
IN
Signal to synchronized LSI with commercial power source
frequency(50Hz).
This is basic timing for time processing of LSI.
IN
Signal coming from encoder.
Signal similar to INT1. Pulse signals are input into P41.
IN/OUT
Terminal not used.
IN
Signal coming from touch key.
When any one of G11 line keys on key matrix is touched, a corresponding signal
from P23 - P27 will be input into P77. When no key is touched, the signal is held
at "L" level.
IN
Signal similar to P77.
When any one of G7 line keys on key matrix is touched, a corresponding signal will
be input into P76.
IN
Signal similar to P77.
When any one of G5 and G9 line keys on key matrix is touched, a corresponding
signal will be input into P75.
IN
Signal similar to P77.
When any one of G2 line keys on key matrix is touched, a corresponding signal will
be input into P74.
IN/OUT
Terminal not used.
IN
Connected to VC.
IN
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.
IN
Terminal not used.
OUT
Terminal not used.
IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G4 and G12 line keys on matrix is touched.
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G10 line keys on matrix is touched.
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G6 line keys on matrix is touched.
Description
771M -
11
H : GND
L (-5V)
20 msec
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