User Guide
27
DN-D9000
SP3721A Terminal Function
SP3721A (FG: IC502)
DescriptionPin No.
Pin Name
Type
1, 2 DVDREP, DVDREN I RF Signal Inputs. Differential RF signal attenuator input pins
63 CDRF I RF Signal Inputs. Single-ended RF signal attenuator input pin
59, 60 AIP, AIN I AGC Amplifier Inputs. Differential AGC amplifier input pins
53, 54 DIP, DIN I
Analog inputs for RF Single Buffer. Differential analog inputs to the RF single-ended output buffer
and full wave rectifier
32 FDCHG# I
Low Impedance Enable. A TTL compatible input pin that activates the FDCHG switches. A low
level activates the switches and the falling edge of the internal FDCHG triggers the fast decay for
the MIRR bottom hold circuit. (open high)
49 HOLD1 I
Hold Control. A TLL compatible control pin which, when pulled high, disables the RF AGC charge
pump and holds the RF AGC amplifier gain at its present value. (open high)
11~14 D, C, B, A I Photo Detector Interface Inputs. Inputs from the main beam Photo detector matrix outputs
5~8 A2, B2, C2, D2 I
Photo Detector Interface Inputs. AC coupled inputs for the DPD from the main beam Photo
detector matrix outputs
15~16 F, E I CD tracking Error Inputs. Inputs from the CD photo detector error outputs.
3~4 PD1, PD2 I CD Photo detector Interface Inputs. Inputs from the CD photo detector error outputs
40 MEI I Mirror Envelope Inputs. The SIGO envelope input pin
35 MIN I
RF signal Input for Mirror. AC coupled inputs for the mirror detection circuit from the pull-in signal
output. (PI)
21 DVDPD I APC Input. DVD APC input pin from the monitor photo diode
23 CDPD I APC Input. CD APC input pin from the monitor photo diode
25 LDON# I APC Output On/Off. APC output control pin. A low level activates the LD output. (open high)
61, 62 ATON/ATOP O Differential Attenuator Output. Attenuator outputs
51, 52 FNN, FNP O Differential Normal Output. Filter normal outputs
57 SIGO O Single Ended Normal Output. Single-ended RF output
64 CDRFDC O CD RF Signal Output. Single ended CD RF summing output
42 FE O Focusing Error Signal Output. Focus error output reference to VCI
41 TE O Tracking Error Signal Output. Tracking error output reference to VCI
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MLPF
MEVO
MIN
PI
DFT
TPH
MEV
MEI
TE
FE
CE
LCN
LCP
SCLK
SDATA
SDEN
E
F
A
B
C
D
CN
CP
D2
C2
B2
A2
PD2
PD1
DVDRFN
DVDRFP
32313029282726252423222120191817
49505152535455565758596061626364
HOLD1
VNA
FNN
FNP
DIP
DIN
RX
BYP
SIGO
VPA
AIP
AIN
ATON
ATOP
CDRF
CDRDDC
FDCHG#
VIB
VIP
VIIRR
VPB
VCI
VC
LDON#
CDLD
CDPD
DVDLD
DVDPD
VNB
NC
VCI2
CDTE
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