15
R-4A68
DESCRIPTION OF LSI
LSI(IZA690DR)
The I/O signal of the LSI(IZA690DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
2
XIN
IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect
to XIN terminal.
3
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 set. Thereafter set at “H” level.
4
R70
OUT
Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and indicators.
Normally, one pulse is output in every synchronized signal period, and input to the anode of
the light-emitting diode.
5
PULSE
OUT
Signal to sound buzzer.
A: key touch sound(0.12sec.).
B: Completion sound(2.4sec.).
6
R72
OUT
Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the light-
emitting diode.
7-9
R40-R42
OUT
Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the light-
emitting diode.
10
AIN3
IN
Terminal to change cooking constant.
11
R50
OUT
Segment data signal.
Signal similar to R70.
12
R51
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G2 line keys on key matrix is touched.
13
R52
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G3 line keys on key matrix is touched.
14
VSS
IN
Connected to VC.
15
R53
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G4 line keys on key matrix is touched.
16
R60
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G5 line keys on key matrix is touched.
17
R61
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G6 line keys on key matrix is touched.
