Adc Power-Down Control; Figure 4: Required Hardware Configuration When Using +5 V From Hdmi Source(S) To Provide Edid Support In Powered Off State - Analog Devices ADV7850 Hardware Manual

+ 5 V
H D M I
P ort D
+ 5 V
H D M I
P ort C
+ 5 V
H D M I H D M I
P ort B
+ 5 V
H D M I
P ort A
+ 5 V
VGA
Port

Figure 4: Required Hardware Configuration When Using +5 V from HDMI Source(s) to Provide EDID Support in Powered Off State

ADC Power-down Control

3.2.5
The ADV7850 contains 12-bit ADCs (ADC 0, ADC 1, ADC 2, and ADC3). It is possible to power down each ADC individually, if
required.
pdn_adc0, AFE, Address 0x00[0]
This control is used to power down ADC0.
Function
pdn_adc0
0
1 
pdn_adc1, AFE, Address 0x00[1]
This control is used to power down ADC1.
Function
pdn_adc1
0
1 
pdn_adc2, AFE, Address 0x00[2]
This control is used to power down ADC2.
Function
pdn_adc2
0
1 
pdn_adc3, AFE, Address 0x00[3]
This control is used to power down ADC3.
Rev. A May 2012
Description
Power up
Power down
Description
Power up
Power down
Description
Power up
Power down
S P I
VDD_EEPROM
E E P R O M
4
(8 k b it)
SPI interface
RXD_5V
RXC_5V
RXB_5V
RXA_5V
VGA _5V
32
ADV7850
A D V 7850