20
R-305BW
R-309BW
Pin No.
Signal
I/O
Description
27
R81
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G7 line keys on key matrix is touched.
28
R82
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G6 line keys on key matrix is touched.
29
R83
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G5 line keys on key matrix is touched.
30
R90
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G4 line keys on key matrix is touched.
31
R91
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G3 line keys on key matrix is touched.
32
R92
OUT
Terminal not used.
33
XIN
IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the capacitor and resistor circuit with respect
to XOUT terminal.
34
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
35
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to
"L" level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H" level.
36
HOLD
IN/OUT
Connected to GND.
37
VLC
IN
Signal synchronized with commercial power source frequency.
Signal similar to VSS.
38
COM1
OUT
Common data signal: COM1.
Connected to LCD (Pin No. C1)
39
COM2
OUT
Common data signal: COM2.
Connected to LCD (Pin No. C2)
40
COM3
OUT
Common data signal: COM1.
Connected to LCD (Pin No. C3)
41
COM4
OUT
Terminal not used.
42
VDD
IN
Power source voltage input terminal.
Connected to GND.
