Sharp R-340DK Service Manual page 24

R- 340DK
R-340DW
LSI(IXA029DR)
The I/O signal of the LSI(IXA029DR) is detailed in the following table.
Pin No. Signal
1 TIOCA2 OUT
2 A20 OUT
3 Vcc
4 TMO0 OUT
5 PB1
6 PB2
7 PB3
8 PB4
9 PB5
10-11 PB6-PB7 OUT
12 RESO OUT
13 Vss
14 TxD0 OUT
15 P91 OUT
16 RxD0 OUT
17 P93 OUT
18 P94 OUT
19 P95 OUT
20 P40 OUT
21 P41 OUT
22 P42 OUT
23 P43 OUT
24 Vss
I/O
Terminal not used.
Terminal not used.
IN Power source voltage : +5.0V.
The power source voltage to drive LSI is input to Vcc terminal. Connected to Vcc.
Signal to sound buzzer.
A: key touch sound (short beep). B: Completion sound (melody or long beep).
IN Signal coming from touch key.
When either G11 line on key matrix is touched, a corresponding signal out of P93, P94,
P95, P40, P41, P42, P43 and P44 will be input into PB1. When no key is touched, the
signal is held at "H" level.
IN Signal similar to PB1.
When either G12 line on key matrix is touched, a corresponding signal will be input into PB2.
IN Signal similar to PB1.
When either G13 line on key matrix is touched, a corresponding signal will be input into PB3.
IN Signal similar to PB1.
When either G6 line on key matrix is touched, a corresponding signal will be input into PB4.
IN Signal similar to PB1.
When either G5 line on key matrix is touched, a corresponding signal will be input into PB5.
Terminal not used.
Terminal not used.
IN Power source voltage: GND(0V).
The power source voltage to drive LSI is input to Vss terminal.
Data signal is output to a memory IC (IC4).
Clock signal is output to a memory IC (IC4).
Terminal not used.
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G1 line keys on key matrix is touched.
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G2 line keys on key matrix is touched.
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G3 line keys on key matrix is touched.
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 and AN1 terminal
while one of G14 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch screen section. A pulse signal is input to PB1-PB5 terminal while
one of G7 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch screen section. A pulse signal is input to PB1-PB5 terminal while
one of G8 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch screen section. A pulse signal is input to PB1-PB5 terminal while
one of G9 line keys on key matrix is touched.
IN Power source voltage : GND(0V).
The power source voltage to drive LSI is input to VSS terminal.
Description
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