Sony CD Walkman D-E880, Руководство по обслуживанию

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5-6. IC PIN FUNCTION DESCRIPTION
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IC801 (SYSTEM CONTROLLER)
TMP88CM22F-1A28 (EXCEPT US: TYPE A), TMP88CM22F-1A35 (EXCEPT US: TYPE B), TMP88CM22F-1A42 (US)
Pin No. Pin Name I/O Description
1 VSS
— Ground terminal
2 IRRMC I Not used (Fixed at “L”)
3 FOKI I
Focus OK signal input from the digital servo processor (IC601) “L”: NG, “H”: OK
4 AGCCON O
AGC control pulse signal output terminal
5
XLEDDISP O CHG/HOLD LED control signal output terminal Not used (open)
6
VCC
SWITCHING
O Control signal output terminal for the switching power supply circuit
7 AMUTE
O Analog audio muting ON/OFF control signal output terminal “H”: muting ON
8 VCC2 ON
O VCC2 voltage control signal output terminal
9 XRST O
Reset signal output to the CXD3027R (IC601) “L”: reset
10 SCK
O Serial data transfer clock signal output to the CXD3027R (IC601)
11 SDTI
I Serial data input from the CXD3027R (IC601)
12 SDTO
O Serial data output to the CXD3027R (IC601)
13 SLPOUT O
WAKE-UP control signal output terminal (for system standby reset)
14 SEL
I Plug-in detection signal input terminal of LINE OUT/OPTICAL OUT
15 CHGMNT1 I
Battery charge voltage detection input from the power control (IC401)
16 VCDKEY
I Key input from the S809, S810 (/–) and switch unit (A/D input)
17 BATMNT
I Battery voltage detection signal input terminal
18
KEY I Key input from the switch unit (A/D input)
19
RMKEY I Key input from the headphone with remote commander (A/D input)
20
DCINMNT I
DC input voltage detection input terminal (A/D input) and DC input jack use/no use detection
input terminal
21
OPEN I
CD door open/close detection switch (S801) input terminal
The stop status is reset with the falling edge of input signal
22
VREFL I Reference voltage input terminal (0V) for A/D converter
23
VREFH I Reference voltage input terminal (+2V) for A/D converter
24
VDD — Power supply terminal (+2V)
25
SCOR I Sub-code sync (S0+S1) detection signal input from the CXD3027R (IC601)
26 GRSCOR I Communication clock signal input from the CXD3027R (IC601)
27 FG I FG pulse signal input from the spindle motor driver (IC402)
28 BEEP O Beep sound output to the headphone amplifier (IC351)
29 NC — Not used (Fixed at “H”)
30 RMSCK O Communication clock output to the communication format converter (IC802)
31 RMDATI I
Communication data bus input of headphone with remote commander from the communication
format converter (IC802)
32 RMDATO O
Communication data bus output of headphone with remote commander to the communication
format converter (IC802)
33 RMRW O
Read/write control signal output of headphone with remote commander to the communication
format converter (IC802) “L”: read mode, “H”: write mode
34 RMLAT O
Serial data latch pulse signal output of headphone with remote commander to the communication
format converter (IC802)
35 WFCKI I Demodulation signal input from the CXD3027R (IC601)
36 COMPON I I Not used (open) (Only US model: pull up)
37 XNTSC I Not used (Fixed at “H”)
38 AVLS I
AVLS (Automatic Volume Limiter System) switch (S803) input terminal
“L”: normal mode, “H”: limit mode