Circuit Description
(VE710s-4/VE710b-4 Realtek Scaler)
A. Scaling controller
General
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Embedded dual DDC support DDC1, DDC2B,DDC/CI
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Zoom scaling up and down
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Embedded Pattern Generator
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No external memory required.
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Require only one crystal to generate all timing
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Embedded reset control output
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Embedded crystal output to MICROP
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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)
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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)
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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
ViewSonic Corporation
Confidential - Do Not Copy
VE710s-4_VE710b-4
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