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CDX-CA850/CA850X/CA860X
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTIONS
• IC501 CXD2598Q (DIGITAL SERVO, DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)
Pin No. Pin Name I/O Pin Description
1 DVDD — Digital power supply pin
2 DVSS — Digital ground
3 SOUT O Servo brock serial data output (Not used.)
4 SOCK O Servo brock serial data read clock output (Not used.)
5 XOLT O Servo brock serial data latch output (Not used.)
6 SQSO O Sub Q 80 bit, PCM peak and level data output. CD TEXT data output
7 SQCK I Clock input from SQSO read output.
8 SCSY I Fixed at “L”.
9 SBSO O Serial output of sub-P to W. (Not used.)
10 EXCK I Clock input from SBSO read output. (Fixed at “L”)
11 XRST I System reset (“L”: Reset)
12 STSM I System mute input (Fixed at “L”)
13 DATA I Serial data input from CPU.
14 XLAT I Latch input from CPU. Latch serial data at the falling edge.
15 CLOK I Serial data transfer clock input from CPU.
16 SENS O SENS output for CPU.
17 SCLK I Clock input from SENS serial data read.
18 ATSK I/O Input/output for anti-shock.
19 WFCK O WFCK (Write Flame Clock) output (Not used.)
20 XUGF O XUGF output (Not used.)
21 XPCK O XPCK output (Not used.)
22 GFS O GFS output
23 C2PO O C2PO output (Not used.)
24 SCOR O “H” output at either detection, sub code sync S0 or S1.
25 C4M O 4.2336 MHz output (Not used.)
26 WDCK O Word clock input f=2Fs (Not used.)
27 COUT I/O Track number count signal input/output (Not used.)
28 MIRR I/O Mirror signal input/output (Not used.)
29 DVSS — Digital ground
30 DVDD — Digital power supply pin
31 DFCT I/O Diffect signal input/output (Not used.)
32 FOK I/O Focus OK signal output
33 PWM1 I External control input of spindle motor.
34 LOCK I/O Lock signal input/output
35 MDP O Servo control output of spindle motor.
36 SSTP I Disc most inner track detection signal input
37 FSTIO I/O 2/3 frequency division output of pins ih and ij. (Not used.)
38 SFDR O Sled drive output
39 SRDR O Sled drive output
40 TFDR O Tracking drive output
41 TRDR O Tracking drive output
42 FFDR O Focus drive output
43 FRDR O Focus drive output
44 DVDD — Digital power supply pin
45 DVSS — Digital ground
46 TEST I Test pin (Fixed at “L”)
47 TES1 I Test pin (Fixed at “L”)
48 XTSL I X’tal select input (“L”: 16.9344 MHz, “H”: 33.8688 MHz)
49 VC I Center voltage input
50 FE I Focus error signal input
51 SE I Sled error signal input