Hitachi C15-LC880SNT Service Manual page 27

INFORMATION OF ICS
IC GM5221 PQFP-208 (Analog Input Port)
Pin No. Pin Name
141 AVDD_BLUE_3.3 Analog power (3.3V) for the blue channel. Must be bypassed with
142 BLUE+
143 BLUE-
144 AGND_BLUE
145
AVDD_GREEN_3.3
146 SOG_MCSS
147 GREEN+
148 GREEN-
149 AGND_GREEN
150 AVDD_RED_3.3
151 RED+
152 RED-
153 AGND_RED
154 AVDD_ADC_3.3
156 AGND_ADC
163 GND1_ADC
164 VDD1_ADC_1.8
181 HSYNC/CSYNC
182 VSYNC
capacitor to AGND_BLUE pin on system board.
Positive analog input for Blue channel.
Negative analog input for Blue channel.
Analog ground for the blue channel. Must be directly connected to the
analog system ground plane.
Analog power (3.3V) for the green channel. Must be bypassed with
capacitor to AGND_GREEN pin on system board.
Dedicated Sync-on-Green pin.
NOTE: This pin requires the same AC-couple capacitor (if applicable)
like the regular RGB input pins.
Positive analog input for Green channel.
Negative analog input for Green channel.
NOTE: For SOG support this pin should be pulled down to GND
through a 1M Ω , resistor.
Analog ground for the green channel. Must be directly connected to the
analog system ground plane.
Analog power (3.3V) for the red channel. Must be bypassed with
capacitor to AGND_RED pin on system board.
Positive analog input for Red channel.
Negative analog input for Red channel.
Analog ground for the red channel. Must be directly connected to the
analog system ground plane.
Analog power (3.3V) for ADC Analog blocks that are shared by all three
channels. Includes bandgap reference, master biasing and full scale
adjust. Must be bypassed with capacitor th AGND_ADC pin on system
board.
Analog ground for ADC analog blocks that are shared by all three
channels. Includes bandgap reference, master biasing and full scale
adjust. Must be directly connected to analog system ground plane.
Digital GND for ADC clocking circuit. Must be directly connected to the
digital system ground plane.
Digital power (1.8V) for ADC encoding logic. Must be bypassed with
capacitor to GND1_ADC pin on system board.
ADC input horizontal sync or composite sync input.
[Input, Schmitt trigger with 1V hysteresis and 1.65V threshold. 5V-tolerant]
ADC input vertical sync.
[Input, Schmitt trigger with 1V hysteresis and 1.65V threshold. 5V-tolerant]
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Description