LG GCC-4520B Service Manual page 38

Pin description
Pin Numbers Symbol
Data PLL Interface (11)
11 PLLVDD33
10 JITFN
9 JITFO
8 LPFOP
7 LPFIN
6 LPFIP
5 LPFON
4 LPION
3 LPIOP
2 PLLVSS
1 IREF
RF Signal Interface (16)
216 RFIP
215 RFIN
214 RFDTSLVN
213 SCOP
212 SCON
211 RFDTSLVP
203 RFSUBI
174 WBLSI
179 RLDON(UDGA
TE)/ICE
177 WLDON
(IDGATE)
182 H11T(VFO13)
Type Description
Power Power for data PLL and related analog circuitry.
Analog Input The input terminal of RF jitter meter.
Analog Output The output terminal of RF jitter meter.
Analog Output The positive output of loop filter amplifier.
Analog Input The negative input terminal of loop filter amplifier.
Analog Input The positive input terminal of loop filter amplifier.
Analaog Ouptut The negative ouotput of loop filter amplifier.
Analog Output The negative output of VCO integrator.
Analog Output The positive output of VCO integrator.
Ground Ground pin for data PLL and related analog circuitry.
Analog Input Current reference input. It generate reference current for data
PLL. Connect an external 8.2K resistor to this pin and PLLVSS.
Analog Input The positive input terminal RF differential signal.
Analog Input The negative input terminal of RF differential signal.
Analog Output The negative output of RF data slicer level
Analog Output The positive output of data slicer current. This pin is active when
TRONS= 1. Otherwise this pin is high inpedence.
Analog Output The negative output of data slicer current. This pin is active when
TRONS= 1. Otherwise this pin is high inpedence.
Analog Output The positive ouput of RF data slicer level.
Analog Input RF subtraction signal input terminal.
3.3V LVTTL Wobble signal input terminal
Input, SMT
3.3V LVTTL I/O, Read laser diode on control signal.(non-DVDRAM mode)
75K pull-down,
Alternate function :
4mA driving.
1. ICE mode selection input during power-on stage (PRST falling
2. DVD-RAM recording data gate signal output terminal
3.3V LVTTL , Write laser diode on control signal. (non-DVDRAM mode)
output,
Alternate function:
75K pull-down,
1. HRST_extension selection input during power-on stage (PRST
4mA driving
2. Header detect signal output terminal (DVDRAM mode)
3.3V LVTTL EFM 11T indicator for ROPC sampling. (non-DVDRAM mode)
output, Slew rate
Alternate function: The 1
8mA driving
edge). A logical low input indicates internal µP is used.
A logical high input indicates external µP is connected.
(DVDRAM mode).
falling edge). A logical low input indicates extended HRST_ is
used. A logical high input indicates raw HRST_ is used.
st , 3 rd
(DVDRAM mode)
header VFO pulse output terminal
41