Diagrams; Explanation Of Ic Terminals - Sony Walkman D-E777 Service Manual

5-1. EXPLANATION OF IC TERMINALS

IC801 (SYSTEM CONTROLLER) T5U87-05
Pin No. Pin name
1 VSS
2 RESERVE
3 FOKI
4 AGCPWM
5 RESERVE
6 RESERVE
7 AMUTE
8 VCC2 ON
9 XRST
10 SCK
11 MSDTI
12 MSDTO
13 WAKE UP
14 SEL
15 CHGMNT
16 KEY2
17 BATMNT
18 KEY1
19 RMKEY
20 DCINMNT
21 OPEN
22 VREFL
23 VREFH
24 VDD
25 SCOR
26 GRSCOR
27 MIR
28 BEEP
29 RESERVE
30 RESERVE
31 RESERVE
32 TSB
33 TXTSKIP
34 XDIG VOL
35 CD RW
36 COMPRESSION
37 DIG TU
38 AVLS
39 HOLD
40 EXBAT
SECTION 5

DIAGRAMS

I/O
— Ground terminal.
— Not used (OPEN).
I Focus OK signal input from the digital servo processor (IC601). "L": NG, "H": OK
O AGC control pulse signal output terminal.
— Not used (OPEN).
— Not used (OPEN).
O Analog audio muting ON/OFF control signal output terminal. "H": muting ON
O VCC2 voltage control signal output terminal.
O Reset signal output to IC601.
O Serial data transfer clock signal output to IC601.
I Serial data input from the IC601.
O Serial data output to IC601.
O WAKE-UP control signal output terminal (for system standby reset).
I Plug-in detection signal input terminal of LINE OUT/OPTICAL OUT.
I Battery charge voltage detection input from the power control (IC401).
I Volume key input terminal.
I Battery voltage detection signal input terminal
I Key input terminal.
I Key input from the headphone with remote commander (A/D input).
DC input voltage detection input terminal (A/D input) and DC input jack use/no use
I
detection input terminal.
CD door open/close detection switch (S801) input terminal.
I
The stop status is reset with the falling edge of input signal.
I Reference voltage input terminal (0V) for A/D converter.
I Reference voltage input terminal (+2V) for A/D converter.
— Power supply terminal (+2V).
I Sub-code sync (S0+S1) detection signal input from the IC601.
I GRSCOR signal input from the IC601.
I FG pulse signal input.
O Beep sound output to the headphone amplifier (IC302).
— Not used (OPEN).
— Not used (OPEN).
— Not used (OPEN).
O Communication data bus output of headphone with remote commander.
— Not used (OPEN).
— Not used (OPEN).
— Not used (OPEN).
I G PROTECTION switch input.
— Not used (OPEN).
AVLS (Automatic Volume Limiter System) switch (S803) input terminal.
I
"L": normal mode, "H": limit mode
I HOLD switch (S803) input terminal. "L": hold ON, "H": hold OFF
I External battery detection signal input terminal.
D-E777/EJ721/EJ725
Description
"L": reset
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