42
HCD-RG121
5-19. IC PIN FUNCTION DESCRIPTION
• IC101 CXD3058AR (RF AMP) (BD80A BOARD)
Pin No.
Pin Name
I/O
Description
1
MIRR
I/O
Mirror signal input/output (Not used)
2
DFCT
I/O
Defect signal input/output (Not used)
3
FOK
I/O
Focus OK signal input/output (Not used)
4
VSS
–
Internal digital ground
5
LOCK
I/O
GFS is sampled at 460Hz; when GFS is high , this pin outputs a high signal If
GFS is low eight consecutive
6
MDP
O
Spindle motor servo control output
7
SSTP
I
Disk innermost detection signal input
8
IOVSS1
–
I/O digital ground
9
SFDR
O
Sled drive output
10
SRDR
O
Sled drive output
11
TFDR
O
Tracking drive output
12
TRDR
O
Tracking drive output
13
FFDR
O
Focus drive output
14
FRDR
O
Focus drive output
15
IOVDD1
–
I/O digital power supply
16
AVDD0
–
Analog power supply
17
AVSS0
–
Analog ground
18
E
I
E signal input
19
F
I
F signal input
20
TEI
I
Tracking error signal input to DSSP block
21
TEO
O
Tracking error signal output from RF amplifier block
22
FEI
I
Focus error signal input to DSSP block
23
FEO
O
Focus error signal output from RF amplifier block
24
VC
I/O
Center voltage output from RF amplifier block
25
A
I
A signal input
26
B
I
B signal input
27
C
I
C signal input
28
D
I
D signal input
29
AVDD4
–
Analog power supply
30
RFDCO
O
RFDC signal output (Not used)
31
PDSENS
I
Reference voltage pin for PD
32
AC_SUM
O
RFAC summing amplifier output
33
EQ_IN
I
Equalizer circuit input
34
LD
O
APC amplifier output
35
PD
I
APC amplifier input
36
RFC
I
Equalizer cut-off frequency adjustment pin
37
AVSS4
–
Analog ground
38
RFACO
O
RFAC signal output
39
RFACI
I
RFAC signal input or EFM signal input
40
AVDD3
–
Analog power supply
41
BIAS
I
Asymmetry circuit constant current input
42
ASYI
I
Asymmetry comparator voltage input
43
ASYO
O
EFM full-swing output (Low = VSS, High = VDD)
44
VPCO
O
Wide-band EFM PLL charge pump output
45
VCTL
I
Wide-band EFM PLL VCO2 control voltage input
46
AVSS3
–
Analog ground
Summary of Contents for HCD-RG121
Page 65: ...65 HCD RG121 MEMO ...
