31
Analog Pins
Name Type Description
BYP — The RF AGC integration capacitor CBYP, is connected between BYP and VPA.
CP — DIFFERENTIAL PHASE TRACKING LPF PIN: The external capacitance is connected between CN.
CN — DIFFERENTIAL PHASE TRACKING LPF PIN: The external capacitance is connected between CP.
LCP — LENS SHIFT OFFSET CANCEL LPF PIN: The external capacitance is connected between LCN.
LCN — LENS SHIFT OFFSET CANCEL LPF PIN: The external capacitance is connected between LCP.
MP — MIRR TOP HOLD PIN: The external capacitance is connected to VPB.
MB — MIRR BOTTOM HOLD PIN: The external capacitance is connected to VPB.
MEV — RFDC BOTTOM ENVELOPE PIN: The external capacitance is connected to VPA.
MLPF — MIRROR LPF PIN: An external capacitance is connected to VPB.
TPH — PI TOP HOLD PIN: An external capacitance is connected to VPB.
VC — REFERENCE VOLTAGE OUTPUT: This pin provides the DC bias reference voltage (VPB/2). Output impedance is less
than 50 Ω.
V125 — REFERENCE VOLTAGE OUTPUT: DC bias voltage output and it is also used for servo output reference. (V25/2)
RX — REFERENCE RESISTOR INPUT: An external 12.0 k&, 1 % resistor is connected from this pin to ground to establish a
precise PTAT (proportional to absolute temperature) reference current for the fi lter.
DVDRFP
DVDRFN
RFSIN
ATOP
ATON
AIN
AIP
FNP
DIN
DIP
RFAC
FNN
MUX
INPUT
BIAS
ATT
63
A
12
CD_A
16
B 11
CD_B 15
C
10
CD_C 14
D
CD_D 13
CD_E
18
CD_F 17
2
9
A2
3
1
INPUT
SEL
INPUT IMP
SEL
2
INPUT IMP
SEL
2
2
4
ATT
62 61 60 59
AGC
PROGRAMMABLE
EQUAL I ZER
FILTER
DIFFERENTIATOR
AGCO
53 52
SSOUT
Clamp
& Env
Level
DAC
SIGDET
FULL WAVE
RECT I FIER
OUTPUT INHIBIT
FROM S-PORT
55 54 57
56
AGC
CHARGE
PUMP
FAST At tackof f
AGC HOLD
B+D
A+C
A+D
B+C
MUX
D
C
B
A
GCA
GCA
GCA
GCA
GCA
GCA
GCA
GCA
W/LPF
W/LPF
W/LPF
W/LPF
SUM
Amp .
12dB is added
@ high gain mode
12dB is added
@ high gain mode
6dB is added
@ high gain mode
12dB is added
@ hi gh gain mode
3
3
4
FROM
S-PORT
FROM
S-PORT
FROM
S-PORT
FROM
S-PORT
CD/DVD
GCA
4dB
Offset
cansel
LPF GCA
70kHz 6dB, 4bit
6dB, 4bit
4dB
4
4
FROM
S-PORT
FROM
S-PORT
5
Offset
cansel
LPF
70kHz
FROM
S-PORT
FROM
S-PORT
FROM
S-PORT
FROM
S-PORT
5
TOPHLD
BCA DET
- 6dB @ no rma l
COMP
Pll
SEL
BYP
49
RX
40
FE
38
PI
35
TPH
34
DFT
RFDC
DAC
2
Buf f
61
CE
41
MNTR
TOPHOLD
TOPHOLD
6dB
Amp
Offset
cansel
GCA
GCA SEL
MNTR
Cnt r l
PI
FE
TE
CE
V25
V125
V25/3
42
LCP
44
LCN
43
TE
CP
LPF
ATT
Pol sel.
buff(-12dB)
HLDEN
3
3
CE-ATT
CEPOL
+3dB
GCA
GCA
GCA
7
CN
8
Offset
cansel
LPF GCA
SUBMUX
TE
RST
39
V25
37
V125
36
VC
20
SDEN
48
SDATA
47
SCLK
46
V33
45
FROM
S-PORT
6
CEFDBCD/ DVDCP/ CN
Low lmp
EQ
B2
4
C2
5
D2
CDPD
6
GCA
GCA
GCA
PHASE
DETECTOR
PHASE
DETECTOR
EQ
EQ
EQ
3
3
VC
Comp .
V25/2
for servo output ref.
VC=VPB / 2
VCI forservo input
SERIAL PORT
REGI STER
V33 for
output buff
MIRR
27
LINK
VPA
58
VPB
19
VNA
51
VNB
2533
MB
29
MP
28
MLPF
30
MIN
31
MEVO
32
MEV
LINKEN
MIRR
COMP
Comp
hys & offset
From S-port
CONTROL
Signals
To each block
PEAK/
BOTTOM
HOLD
Internal
FDCHG
Disk det &
Mirr LPF
From S-port
2
2
2
Mirr gain
From S-port
INPUT
BUFF
Input lmp
From S-port
MUX
Pll
50
DVDLD
21
CDLD
22
LDON
26
BOTTOM
ENVELOPE
AGCO
Sink current
From S-port
Dual APC
24
DVDPD
23
APC SEL
DVD/CD
From S-port
LD H/L
Q101 : CXD1881R
