20
R-25AM
20-21 P46-P45 - Terminal not used.
22 P44 OUT Oven lamp, Blower motor and Antenna motor driving signal (Square Waveform
: 50Hz).
To turn on and off the shut-off relay (RY1).
The Square waveform voltage is delivered
to the RY1 relay driving circuit and relays
(RY3, RY4, COOK RELAY) control circuit.
23 P43 - Terminal not used.
24 P42 IN Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pulse signals. And pulse
signals are input into P42.
25 INT1 IN Signal synchronized with commercial power source frequency.
This is basic timing for all time processing of LSI.
26 INT0 IN Signal coming from encoder.
Signal similar to P42. Pulse signals are input into INT0.
27 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 reset. Thereafter
set at "H" level.
28 P71 OUT Memory (EEPROM) clock output.
29 P70 IN/OUT Memory (EEPROM) data input/output.
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 - Terminal not used.
34 P26 IN Signal coming from switch unit.
When either one of G-1 line switches on switch matrix is touched, a corresponding
signal out of P30 - P31 will be input into P26. When no switch is touched, the signal
is held at "L" level.
35 P25 IN Signal similar to P26.
When either one of G-2 line switches on switch matrix is touched, a corresponding
signal will be input into P25.
36 P24 IN Signal similar to P26.
When either one of G-3 lineswitches on switch matrix is touched, a corresponding
signal will be input into P24.
37-40 P23-P20 OUT Segment data signal.
The relation between signals and indicators are as follows:
Signal Segment Signal Segment Signal Segment
P01 ..................... k P21 ......................... h P15 ..................... d
P02 ...................... j P20 ......................... g P14 ......................c
P03 ...................... i P17 ......................... f P13 ..................... b
P23 .................. LB P16 ......................... e P12 ..................... a
P22 .................. UB
Pin No. Signal I/O Description
H
L
20 msec
During cooking
GND
-31(V)
ß(50Hz)
GND
-5V
20 msec.
OFF
ON
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