Ic Pin Function Description - Sony CDP-XA555ES Service Manual

6-23. IC PIN FUNCTION DESCRIPTION

SERVO BOARD IC101 CXD2545Q
(DIGITAL SIGNAL PROCESSOR, FOCUS/TRACKING/SLED SERVO, EFM COMPARATOR)
Pin No. Pin Name
1 SRON
2 SRDR
3 SFON
4 TFDR
5 TRON
6 TRDR
7 TFON
8 FFDR
9 FRON
10 FRDR
11
FFON
12
VCOO
13 VCOI
14 TEST
15 DVSS
16 TES2
17 TES3
18 PDO
19 VPCO
20 VCKI
21 AVD2
22
IGEN
23
AVS2
24
ADII
25
ADIO
26
RFDC
27 TE
28 SE
29
FE
30
VC
31
FILO
32 FILI
33
PCO
34
CLTV
35
AVS1
36
RFAC
37
BIAS
38 ASYI
39
ASYO
40 AVD1
41 DVDD
42 ASYE
43 PSSL
42
I/O
O Sled servo drive PWM signal output terminal Not used (open)
O
Sled servo drive PWM signal (–) output to the BA6297AFP (IC102)
O
Sled servo drive PWM signal output terminal Not used (open)
O Tracking servo drive PWM signal (–) output to the BA6297AFP (IC102)
O
Tracking servo drive PWM signal output terminal Not used (open)
O
Tracking servo drive PWM signal (+) output to the BA6297AFP (IC102)
O
Tracking servo drive PWM signal output terminal Not used (open)
O
Focus servo drive PWM signal (+) output to the BA6297AFP (IC102)
O
Focus servo drive PWM signal output terminal Not used (open)
O Focus servo drive PWM signal (–) output to the BA6297AFP (IC102)
O Focus servo drive PWM signal output terminal Not used (open)
O Oscillator circuit output terminal for analog PLL of the playback EFM Not used (open)
I Oscillator circuit input terminal for analog PLL of the playback EFM Not used (fixed at "L")
I Input terminal for the test (fixed at "L")
— Ground terminal (digital system)
I Input terminal for the test (fixed at "L")
I Input terminal for the test (fixed at "L")
O
Charge-pump output terminal for analog PLL of the playback EFM Not used (open)
O PLL charge-pump output terminal for the variable pitch Not used (open)
I Clock signal input from external VCO for the variable pitch Not used (fixed at "L")
— Power supply terminal (+5V) (analog system)
I Power supply terminal (+5V) (for operational amplifier)
— Ground terminal (analog system)
I Input terminal for the A/D converter Not used (open)
O Output terminal of the operational amplifier Not used (open)
I RF signal (DC level) input terminal for the digital servo process
I
Tracking error signal input from the RF amplifier in optical pick-up
I Sled error signal input from the RF amplifier in optical pick-up
I Focus error signal input from the RF amplifier in optical pick-up
I Middle point voltage (+2.5V) input from the RF amplifier in optical pick-up
O Filter output terminal for master clock of the playback master PLL
I Filter input terminal for master clock of the playback master PLL
O Phase comparison output terminal for master clock of the playback EFM master PLL
I Internal VCO control voltage input of the playback master PLL
— Ground terminal (analog system)
I RF signal (AC level) input terminal for the EFM demodulator
I Constant current input terminal of the playback EFM asymmetry circuit
I Playback EFM asymmetry comparator voltage input terminal
O Playback EFM full-swing output terminal
— Power supply terminal (+5V) (analog system)
— Power supply terminal (+5V) (digital system)
I Playback EFM asymmetry circuit on/off selection input terminal (fixed at "H")
I Audio data output mode selection input terminal (fixed at "L")
Description