Global Pin Control - Analog Devices Advantiv ADV7619 Hardware User's Manual

Hardware User Guide
Entering Power-Down Mode 0 via Software
The ADV7619 can be put into Power-Down Mode 0 by setting POWER_DOWN to 1 (default value) and CEC_POWER_UP to 0. This
method allows an external processor to put the system in which the ADV7619 is integrated into standby mode. In this case, the CP and
HDMI cores of the ADV7619 are kept powered up from the main power (for example, ac power) and set in or out of power-down Mode 0
through the POWER_DOWN bit.
Power-Down Mode 1
Power-Down Mode 1 is enabled when the following conditions are met:
•
POWER_DOWN bit is set to 1
•
CEC section is enabled by setting CEC_POWER_UP to 1
Power-Down Mode 1 provides the same functionality as Power-Down Mode 0, with the addition of the following sections:
•
XTAL clock
•
CEC section
•
Interrupt controller section
The following pads are enabled in Power-Down Mode 1:
•
Same pads as enabled in Power-Down Mode 0
•
CEC pad
•
INT1 and INT2 interrupt pads
The internal EDID is also accessible through the DDC bus for Port A and Port B in Power-Down Mode 0 and Power-Down Mode 1.

GLOBAL PIN CONTROL

RESET Pin
The ADV7619 can be reset by a low reset pulse on the reset pin with a minimum width of 5 ms. It is recommended to wait 5 ms after the
2
low pulse before an I C write is performed to the ADV7619.
Reset Controls
MAIN_RESET, IO, Address 0xFF[7] (Self-Clearing)
2
Main reset where I C registers are reset to their default values.
Function
MAIN_RESET
0 (default)
1
Tristate Output Drivers
PADS_PDN, IO, Address 0x0C[0]
A power-down control for pads of the digital outputs. When enabled, the pads are tristated and the input path is disabled. This control
applies to the DE, HS, VS/FIELD/ALSB, INT1, and LLC pads and to the P0 to P47 pixel pads.
Function
PADS_PDN
0 (default)
1
DDC_PWRDN[7:0], Addr 68 (HDMI), Address 0x73[7:0]
A power-down control for DDC pads.
Function
DDC_PWRDN[7:0]
00000000 (default)
xxxxxxx
1
xxxxxx1x
Description
Normal operation
2
Applies main I C reset
Description
Powers up pads of digital output pins
Powers down pads of digital output pins
Description
Powers up DDC pads
Powers down DDC pads on Port A
Powers down DDC pads on Port B
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