E-Edid/Repeater Controller; E-Edid Data Configuration - Analog Devices Advantiv ADV7619 Hardware User's Manual

Hardware User Guide
HPA_STATUS_PORT_A, IO, Address 0x21[3] (Read Only)
Readback of HPA status for Port A.
Function
HPA_STATUS_PORT_A
0 (default)
1
HPA_STATUS_PORT_B, IO, Address 0x21[2] (Read Only)
Readback of HPA status for Port B.
Function
HPA_STATUS_PORT_B
0 (default)
1
HPA_OVR_TERM, Addr 68 (HDMI), Address 0x6C[3]
A control to set the termination control to be overridden by the HPA setting. When this bit is set, termination on a specific port is set
according to the HPA status of that port.
Function
HPA_OVR_TERM
0 (default)
1

E-EDID/REPEATER CONTROLLER

The HDMI section incorporates an E-EDID/repeater controller, which performs the following tasks:
•
Computes the E-EDID checksum for each port
•
Performs the repeater routines described in the Repeater Support section
The E-EDID/repeater controller is powered from the DVDD supply and clocked by an internal ring oscillator. The controller and the
internal DDC bus arbiter are kept active in power-down Mode 0 and power-down Mode 1. This allows the internal E-EDID to be
functional and accessible through the DDC port, even when the part is powered down (refer to the Power-Down Modes section).
These HDMI transmitters can then read the capabilities of the powered-down application integrating the ADV7619 by accessing its
internal E-EDID through the DDC ports.
The E-EDID/repeater controller is reset when the DVDD supplies go low or when HDCP_REPT_EDID_RESET is set high. When the
E-EDID/repeater controller reboots, it performs the following tasks:
•
Clears the internal E-EDID and Key Selection Vector (KSV) RAM (refer to E-EDID Data Configuration section and the Internal
HDCP Key OTP ROM section )
•
Computes a checksums for two ports (refer to the Structure of Internal E-EDID for Port B section)
•
Updates the SPA registers
HDCP_REPT_EDID_RESET, Addr 68 (HDMI), Address 0x5A[3] (Self-Clearing)
A reset control for the E-EDID/repeater controller. When asserted, it resets the E-EDID/repeater controller.
Function
HDCP_REPT_EDID_RESET
0 (default)
1

E-EDID DATA CONFIGURATION

The ADV7619 features a RAM that can store an E-EDID. This internal E-EDID feature can be used for both HDMI ports A and B.
The following controls are provided to enable the internal E-EDID for each of the four HDMI ports.
Description
+5 V not applied to HPA_A pin by chip
+5 V applied to HPA_A pin by chip
Description
+5 V not applied to HPA_B pin by chip
+5 V applied to HPA_B pin by chip
Description
2
Automatic or manual I C control of port termination
Termination controls disabled and overridden by HPA controls
Description
Normal operation
Resets the E-EDID/repeater controller
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