Description Of Lsi - Wolf MWD24 Technical Service And Parts Manual

The I/O signal of the LSIis detailed in the following table.
Pin No. Signal
1 - 3 AN5- AN3
4 AN2
5 AN1
6 AN0
7 CNVSS
8 RESET
9 P62
10 P61 IN/OUT Terminal not used.
11 VSS
12 XIN
13 XOUT
14 VCC
15 P60
16 P37
17 P36
18 TXOUT
19 P34
20 RXD2
21 TXD2
22 SCLK2
23 P30
24 - 25
COM3 - COM2
26 COM1
Drawer Microwave
DESCRIPTION OF LSI (IC-1)
I/O
IN Terminal to change cooking input according to the Model.
By using A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.
IN Input signal which inform the drawer door is in the middle position between the opened
position and the closed position, to LSI from the door position switch rear.
IN Terminal not used.
IN Terminal not used.
IN Power source voltage: 0V (GND).
VC voltage of power source circuit input. Connected GND.
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.
OUT Terminal not used.
IN Power source voltage: 0V (GND).
VS voltage of power source circuit input. Connected GND.
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.
OUT Internal clock oscillation frequency control output.
Output to control oscillation input of Xin.
IN Power source voltage: +5V.
VC voltage of power source circuit input.
IN Plus signal coming from the Microwave drawer door open-close motor is input into P60
as revolution number.
IN Input signal which communicates the drawer door open information to LSI from
the door position switch front.
Door opened; "L" level signal(0V).
Door closed; "H" level signal(+5V).
OUT Signal to change the rotational direction is output to the Microwave drawer door
open-close motor.
OUT Signal to change the rotational speed is output to the Microwave drawer door open-close
motor.
OUT Power source to drive the Microwave drawer door open-close motor is output.
IN Input terminal to check the data of display.
Data signal from IC-2 is input to RXD2 to check the flow of the data.
IN Output terminal to send IC-2 the data.
The data of display is output to IC-2.
OUT Clock timing signaI output terminal.
Clock timing signal is sent to IC-2.
OUT Signal to reset LSI.
Signal is output to reset IC-2.
OUT Terminal not used.
OUT Common data signal.
Connected to LCD signal C5.
Description
3-11
Theory of Operation