18
R-310AK
R-330AK
R-330AW
A
B
0.1 sec.
2 sec.
H : GND
L: -5V
H : GND
L: -5V
DESCRIPTION OF LSI
LSI(IZA737DR) : R-330AK / AW
The I/O signal of the LSI(IZA737DR) is detailed in the following table.
Pin No.
Signal
I/O
Description
1-4
AN8-AN11
IN
Connected to GND.
5
AVSS
IN
Connected to VC.
6
TEST
IN
Connected to VC.
7
X2
OUT
Terminal not used.
8
X1
IN
Connected to GND.
9
VSS
IN
Power source voltage : -5.1V.
VC voltage of power source circuit input.
10
OCS1
IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect
to OCS1 terminal.
11
OCS2
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of OCS2.
12
RESET
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.
13
MD0
IN
Connected to GND.
14
P20
IN
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of P24 - P27, P33,
P34, P35 and P36 will be input into P20. When no key is touched, the signal is held at “H” level.
15
P21
IN
Signal similar to P20.
When either G11 line on key matrix is touched, a corresponding signal will be input into P21.
16
P22
IN
Signal similar to P20.
When either G10 line on key matrix is touched, a corresponding signal will be input into P22.
17
P23
IN
Signal similar to P20.
When either G9 line on key matrix is touched, a corresponding signal will be input into P23.
18
P24
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G8 line keys on key matrix is touched.
19
P25
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G7 line keys on key matrix is touched.
20
P26
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G6 line keys on key matrix is touched.
21
P27
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G5 line keys on key matrix is touched.
22
P30
OUT
Signal to sound buzzer (2.0KHz).
A: key touch sound.
B: Completion sound.
23-24
P31-P32
OUT
Terminal not used.
25
P33
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G4 line keys on key matrix is touched.
26
P34
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G3 line keys on key matrix is touched.
27
P35
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G2 line keys on key matrix is touched.
