Service manual

Circuit Description (VE710s-4/VE710b-4 Realtek Scaler)
A. Scaling controller
General
l Embedded dual DDC support DDC1, DDC2B,DDC/CI
l Zoom scaling up and down
l Embedded Pattern Generator
l No external memory required.
l Require only one crystal to generate all timing
l Embedded reset control output
l Embedded crystal output to MICROP
l 3 channels 8 bits PWM output, and selectable PWM clock frequency.
PIN DESCRIPTION
(I/O Legend: A= Analog , I=Input ,O=Output ,P=Power ,G=Ground)
■ ADC: 15 pins
Name I/O Pin No Description Note
ADC_ GND AG 27 ADC ground
ADC_REFIO AP 28 ADC band-gap voltage de-coupling 1.20V
ADC_VDD AP 29 Analog power (3.3V)
BLUE+ AI 30 Analog input from BLUE channel
BLUE- AI 31 Analog input ground from BLUE channel
ADC_ GND AG 32 ADC ground
SOG/ADC_TEST AIO 33 SOG in/ADC test pin
GREEN+ AI 34 Analog input from GREEN channel
GREEN- AI 35 Analog input ground from GREEN channel
ADCB_VDD AP 36 Analog power (3.3V)
RED+ AI 37 Analog input from RED channel
RED_ AI 38 Analog input ground from RED channel
ADC_GND AG 39 Analog ground
ADC_GND AG 40 Analog ground
ADC_VDD AP 41 Analog power (3.3V)
AHS AI 42 Analog HS input (10), (4), (5)
AVS AI 43 Analog VS input (2), (4), (5)
■ PLL:8 pins
Name I/O Pin No Description Note
XO AI 1 Reference clock output
XI AO 2 Reference clock input
DPLL GND AG 3 Ground for digital PLL
DPLL VDD AP 4 Power for digital PLL (3.3V)
APLL VDD AP 5 Power for multi-phase PLL (3.3V)
PLL TEST1 AIO 6 Test Pin 1 / IRQ# 3.3V tolerance
PLL TEST2 AIO 7 Test Pin 2/Power-on-latch for crystal out
Frequency
APLL GND AG 8 Ground for multi-phase PLL
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