User's Manual

23
R-1480
R-1481
R-1482
22 P44 OUT Terminal not used.
23 P43 OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven cavity reaches
the preset temperature in the preheating mode,
or when the preheating hold time (30 minutes) is
elapsed.
24 P42 IN Terminal not used.
25 INT1 IN
Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time processing of LSI.
26 P40 IN Connected to VC.
27 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.
28-29 P71-P70 OUT Terminal not used.
30 XIN IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.
31 XOUT OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
32 VSS IN
Power source voltage:-5V.
VC voltage of power source circuit input.
33 P27 IN
Signal coming from touch key.
When any one of G12 line keys on key matrix is touched, a corresponding signal will be
input into P27. When no key is touched, the signal is held at "L" level.
34 P26 IN
Signal similar to P27.
When any one of G11 line keys on key matrix is touched, a corresponding signal will be
input into P26.
35 P25 IN
Signal similar to P27.
When any one of G10 line keys on key matrix is touched, a corresponding signal will be
input into P25.
36 P24 IN
Signal similar to P27.
When any one of G9 line keys on key matrix is touched, a corresponding signal will be input
into P24.
37-40 P23-P20 OUT
Digit selection signal.
The relationship between digit signal and digit are as follows;
Digit signal .................................. Digit
P14................................................ 1st.
P15...............................................2nd.
P16............................................... 3rd.
P17................................................4th.
P20................................................5th.
P21................................................6th.
P22................................................7th.
P23................................................8th.
(ß : INTO signal)
Refer to the touch control panel circuit about the
relation between signals and digits. Normally,
one pulse is output in every synchronized signal
(ß) period, and input to the grid of the fluorescent
display.
Pin No. Signal I/O Description
A
B
C
H: GND
L
0.1 sec
2 sec
1 sec
1 sec
H : GND
L (-5V)
16.7 msec
H
L
GND
VP
ß(60Hz)
P14
P15
P16
P17
P20
P21
P22
P23