LG HT353SD - Page 36

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2-27
1. IC501 MPEG(MT1389L)
• PIN DESCRIPTION
Pin Main Alt. Type Description
Analog I nterface (66)
125 RFIP Analog Input AC coupled DVD RF signal input RFIP
126 RFIN OPOUT Analog Input AC coupled DVD RF signal input RFIN
127 RFG OPINP Analog Input Main beam, RF AC input path
128 RFH OPINN Analog Input Main beam, RF AC input path
1 RFA Analog Input RF main beam input A
2 RFB Analog Input RF main beam input B
3 RFC Analog Input RF main beam input C
4 RFD Analog Input RF main beam input D
5 RFE Analog Input RF sub beam input E
6 RFF Analog Input RF sub beam input E
7 AVDD18_2 Analog power Analog 1.8V power
8 AVDD33_1 Analog power Analog 3.3V power
9 XTALI Input 27MHz crystal input
10 XTALO Output 27MHz crystal output
11 AGND33 Analog Ground Analog Ground
12 V20 Analog output Reference voltage 2.0V
13 V14 Analog output Reference voltage 1.4V
14 REXT Analog Input
Current reference input. It generates reference current for
RF path. Connect an external 15K resistor to this pin and
AVSS
15 MDI1 Analog Input Laser power monitor input
16 MDI2 Analog Input Laser power monitor input
17 LDO1 Analog Output Laser driver output
18 LDO2 Analog Output Laser driver output
19 AVDD33_2 Analog Power Analog 3.3V power
20 DMO Analog Output Disk motor control output. PWM output
21 FMO Analog Output Feed motor control. PWM output
22 TRAY_OPEN Analog Output Tray PWM output/Tray open output
23 TRAY_CLOSE Analog Output Tray PWM output/Tray close output
24 TRO Analog Output
Tracking servo output. PDM output of tracking servo
compensator
25 FOO Analog Output
Focus servo output. PDM output of focus servo
compensator
26 FG GPIO2 Analog
1) Motor Hall sensor input
2) GPIO
27 USB_DP Analog Input USB port DPLUS analog pin
28 USB_DM Analog Input USB port DMINUS analog pin
29 VDD33_USB USB Power USB Power pin 3.3V
30 VSS33_USB USB Ground USB ground pin
31 PAD_VRT Analog Inout USB generating reference current
32 VDD18_USB USB Power USB Power pin 1.8V
95 DACVDDC Power Power
96 VREF Analog Bandgap reference voltage
97 FS Analog Full scale adjustment (suggest to use 560 ohm)
98 DACVSSC Ground Ground pin for video DAC circuitry
99 CVBS Analog Analog composite output
• Abbreviations:
SR: Slew Rate
PU: Pull Up
PD: Pull Down
SMT: Schmitt Trigger
4mA~16mA: Output buffer driving strength.