Repeater Support; Repeater Routines Performed By The E-Edid/Repeater Controller - Analog Devices ADV7850 Hardware Manual

Function
bg_packet_byte3[7:0]
xxxxxxxx
bg_packet_byte4[7:0], Addr 68 (HDMI), Address 0xF4[7:0] (Read Only)
This readback displays byte 4 of the packet for the InfoFrame/packet selected to be read in the background port.
Function
bg_packet_byte4[7:0]
xxxxxxxx
bg_packet_byte5[7:0], Addr 68 (HDMI), Address 0xF5[7:0] (Read Only)
This readback displays byte 5 of the packet for the InfoFrame/packet selected to be read in the background port.
Function
bg_packet_byte5[7:0]
xxxxxxxx
bg_valid_packet, Addr 68 (HDMI), Address 0xF6[0] (Read Only)
This readback indicates if the background header and packet information is valid.
Function
bg_valid_packet
0 
1

7.38 REPEATER SUPPORT

The ADV7850 incorporates an E-EDID/Repeater controller that provides all the features required for a receiver front end of a fully HDCP
1.3 compliant repeater system. The ADV7850 has a RAM that can store up to 128 KSVs, which allows it to handle up to 128 downstream
devices in repeater mode. Refer to
The ADV7850 features a set of HDCP registers, defined in the HDCP specifications, which are accessible through the DDC bus (refer to
Section 14.2) of the selected port. A subset of the HDCP registers (defined in the following subsections) are also available in the Repeater
Map and are accessible through the main I

Repeater Routines Performed by the E-EDID/Repeater Controller

7.38.1
1. Power Up
A power-on reset circuitry on the DVDD supply is used to reset the E-EDID/Repeater controller when the ADV7850 is powered up.
When the E-EDID/Repeater controller reboots after reset, it resets all the KSV registers listed in
AKSV Update
2.
The E-EDID/Repeater controller resets automatically the bcaps[5] bit to 0 when an HDCP transmitter writes its AKSV into the
ADV7850 HDCP registers through the DDC bus of the selected HDMI port.
Note: Writing a value in the aksv[39:32] triggers an AKSV update and aksv_update_st interrupt if either aksv_update_mb1 or
aksv_update_mb2 is set to 1. This triggers the E-EDID/Repeater controller to reset the bcaps[5] bit back to 0.
KSV List Ready
3.
The ksv_list_ready bit is set by an external controller driving the ADV7850. This notifies the ADV7850 on-chip E-EDID/Repeater
Rev. A May 2012
Description
Packet byte 3 data. Only valid if bg_valid_packet is high.
Description
Packet byte 4 data. Only valid if bg_valid_packet is high.
Description
Packet byte 5 data . Only valid if bg_valid_packet is high.
Description
Background header and packet readbacks not valid
Background header and packet readbacks valid
Table 34.
2 C port (refer to Section 14.1).
214
ADV7850
Table 34.