6-4. Ic Pin Function Description - Sony WM-EX660 Service Manual

6-4. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC701 MSM6576-83GS-K (SYSTEM CONTROLLER)
Pin No. Pin Name
1 M.CTL
2 M.DIR
3 M.BRK
4 RESET
5 TEST1
6 TEST2
7 TEST3
8 L.DOLBY
9 L.AVLS
10 L.BATT
11 L.BLSKIP
12 MUTE CTL
13 PM CTL
14 PHOTO CTL
15 XTB
16 XT
17 VDD
18 VSS1
19 VCM
20 VCP
21 VSS2
22 VEE
23 SET STOP1
24 SET STOP2
25 KEY IN
26 HOLDER SW
27 BEEP
28 AMS IN
29 RMUM
30 DATA
31 DOLBY CTL
32 DDC CTL
33 F/R CTL
34 L.MB
35 L.GRV
36 FWD SW
37 REV SW
38 PHOTO IN
I/O
The output terminal for the control signal to start the motor
O
Turn the motor when set to "H"
The output terminal for selecting the rotating direction of the motor
O
Turn the motor counterclockwise when set to "H", and clockwise when set to "L"
The output terminal for the brake signal to be applied to the motor
O
Turn the brake on when set to "H"
I System reset signal input from the reset signal generator (IC703) "H": reset
I
I
The input terminal for the test (fixed at "L")
I
The output terminal for the LED drive signal of the a NR indicator (D708)
O
"H": LED on
O The output terminal for the LED drive signal of the AVLS indicator (D707) "H": LED on
O
The output terminal for the LED drive signal of the BATT indicator (D703) "H": LED on
The output terminal for the LED drive signal of the BL SKIP indicator (D706)
O
"H": LED on
O
The output terminal of the muting signal "L": mute on
O
The output terminal for the plunger drive signal "H": plunger on
O Control signal output to the motor rotation detect circuit "H": rotation detect circuit on
—
Connected to crystal oscillator (X701 32.768 kHz) for the system clock
—
Connected to crystal oscillator (X701 32.768 kHz) for the system clock
—
Power supply terminal (+1.5V)
—
Ground terminal
—
—
Increases power supply voltage
—
—
I
Battery voltage detect input terminal Middle point voltage (+0.75V) input in this set
I
Battery voltage detect input terminal
I
Key input terminal (A/D input)
Cassette holder open/close detect switch (S701) input terminal
I
"H": cassette holder close, "L": cassette holder open
O
Beep sound signal output terminal (frequency: 1.6 kHz)
I
AMS (Automatic Music Sensor) control signal input from the TA2072AF (IC301)
I
Communication request signal input from the remote commander
O
Serial data output to the remote commander
O
Dolby NR on/off control signal output to the TA2072AF (IC301) "H": dolby NR on
O
Control signal output to the DC/DC converter circuit "H": power on
O FWD/REV selection signal output to the TA2072AF (IC301) "H": FWD, "L": REV
The output terminal for the LED drive signal of the SOUND MB indicator (D705)
O
"H": LED on
The output terminal for the LED drive signal of the SOUND GRV indicator (D704)
O
"H": LED on
I Tape direction switch (S702) input terminal "H": FWD
I
Tape direction switch (S702) input terminal "H": REV
I
Detection signal input from the motor rotation detect circuit
Function
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