Description Of Lsi - Sharp R-201FK Service Manual

The I/O signal of the LSI are detailed in the following table.
Pin No. Signal
1 RESET
2 TEST
3 VSS
4 OCS3
5 OCS4
6 VD1
7 VDD
8 AVDD
9 AVREF
10 AVSS
11-13 P40-P42
14 P43
15 BZ
16 R00
17 R01
18 R02
19 R03
20 P20
21 P21
22 P22
23 P23
24 K00

DESCRIPTION OF LSI

I/O
IN Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied.
IN Connected to GND.
IN Power source voltage: -5V.
VSS voltage of power source circuit input.
IN Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the resistor oscillation circuit with
respect to OCS4 terminal.
OUT Internal clock oscillation frequency control output.
Output to control oscillation input of OCS3.
IN Power source for oscillation circuit.
IN Power source voltage input terminal.
Connected to GND.
IN A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
IN A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
IN Power source voltage: -5V.
AVSS voltage of power source circuit input. Connected to VSS.
IN Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the
Model in operation is applied to set up its function.
IN To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level (-5V).
OUT Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P23, K00, K01 and K02
terminal while one of G1 line keys on key matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P23, K00, K01 and K02
terminal while one of G2 line keys on key matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P23, K00, K01 and K02
terminal while one of G3 line keys on key matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P23, K00, K01 and K02
terminal while one of G4 line keys on key matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P23, K00, K01 and K02
terminal while one of G5 line keys on key matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P23, K00, K01 and K02
terminal while one of G6 line keys on key matrix is touched.
OUT Terminal not used.
IN Signal similar to K02.
When either G7 line on key matrix is touched, a corresponding signal will be input into
P23.
IN Signal similar to K02.
When either G8 line on key matrix is touched, a corresponding signal will be input into
K00.
Description
A
B
19
0.1 sec.
H : GND
L : -5V
2.0 sec.
H : GND
L : -5V
R-201FK/W
R-203FW
R-205FW
R-206FW