LG LF-U850D Service Manual page 14

PIN DESCRIPTIONS
Name Pin NO.
PLL_AVDD 2
PLL_AVSS 5
PLL_DVDD 1
PLL_DVSS 6
PLL_AGS 4
VDD 11,38
VSS 12, 37
IO_VDD 13,27,46
IO_VSS 12,20,30,45
/RESET 10 I
CLK_IN
SA
PLL_EXT_LPF
MLRCK
MBCK
MSDIN
SLRCK
SBCK
SBCK
SSDIN
Type
Power and Groun d
Analog PLL analog power supply. 2.5V supply voltage.
Power
Analog PLL analog ground.
Ground
PLL PLL peripheral digital power supply. 2.5V supply voltage.
Power
PLL PLL digital ground.
Ground
PLL PLL Analog Ground Sensing.
Ground
Power 2.5V Digital power supply. Core power supply.
Ground Core digital ground.
Power 3.3V Digital power supply. I/O power supply.
Ground I/O digital ground.
System Servi ces
H/W reset signal. Active Low Schmitt-Trigger input.
The Schmitt-Trigger input allows a slowly rising input to reset the
chip reliably. The RESET signal must be asserted 'Low' during
power up. De-assert 'High' for normal operation.
48 I External clock input. 12.288MHz is recommended.
When the PLL_BYPASS is "LOW", the external clock input from
CLK_IN is used as PLL reference clock source. The external
oscillator generates 12.288MHz clock and the internal PLL
generates 98.304MHz (12.288MHz x 8) system clock.
7 I Slave Address Set for Host Interface
3 Analog External PLL low pass filter pin.
PCM Audi o Input/Outp ut I nterface
14 I/O PCM Word clock (left-right clock) input/output of main 2-channel
audio. User can select the master/slave mode of this signal.
Schmitt-Trigger input.
15 I/O PCM bit clock input/output of main 2-channel audio.
User can select the master/slave mode of this signal.
Schmitt-Trigger input.
16 I PCM serial data input of main 2-channel audio.
Schmitt-Trigger input.
17 I/O PCM Word clock (left-right clock) input/output of sub 2-channel
audio. User can select the master/slave mode of this signal.
Schmitt-Trigger input.
18 I/O PCM bit clock input/output of 2-channel audio.
User can select the master/slave mode of this signal.
Schmitt-Trigger input.
18 I/O PCM bit clock input/output of 2-channel audio.
User can select the master/slave mode of this signal.
Schmitt-Trigger input.
19 I/O PCM serial data input of sub-channel audio.
User can set this sub-channel data input pins to PCM serial data
output pins. See the Control Register Description part.
Descri pti on
- 2-8 -