Sharp R-330BK Service Manual page 23

LSI(IZA866DR)
The I/O signal of the LSI(IZA866DR) is detailed in the following table.
Pin No. Signal
1 AN8
2 AN9
3 AN10
4 AN11
5 AVSS
6 TEST
7 X2 OUT
8 X1
9 VSS
10 OSC1
11 OSC2 OUT
12 RESET
13 MD0
14 P20 OUT
15 P21 OUT
16 P22 OUT
17 P23 OUT
18 P24 OUT
19 P25 OUT
20 P26 OUT
21 P27 OUT
I/O
IN Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of P20 - P27 will
be input into AN8. When no key is touched, the signal is held at "H" level.
IN Signal similar to AN8.
When either G11 line on key matrix is touched, a corresponding signal will be input into AN9.
IN Signal similar to AN8.
When either G10 line on key matrix is touched, a corresponding signal will be input into AN10.
IN Signal similar to AN8.
When either G9 line on key matrix is touched, a corresponding signal will be input into AN11.
IN A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to VC.
IN Connected to VC.
Terminal not used.
IN Connected to GND.
IN Power source voltage: -5V.
The power source voltage to drive the LSI is input to VSS terminal. Connected to VC.
IN Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect
to OSC1 terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of OSC2.
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 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.
Description
21
R-330BK
R-330BW