Analog Devices Advantiv ADV7604 Hardware Manual page 176

7.20.2.2 KSV FIFO Read from HDCP Registers
The KSV FIFO read at address 0x43 through the HDCP port of the selected HDMI port is dependant
on the value of the REPEATER
• When the
REPEATER
0
• When the
REPEATER
KSV list which is set in the Repeater Map at addresses 0x80 to 0xF7 (refer to
7.20.2.3 First AKSV Update
When the upstream transmitter writes its AKSV for the first time into the ADV7604 HDCP registers,
the external controller driving the ADV7604 should perform the following tasks:
• Update BSTATUS[11:0] according to the topology of the downstream device attached to the
repeater.
• Update the KSV list (refer to
the repeater as well as the KSV from all the downstream devices connected to the repeater.
• Set
KSV_LIST_READY
• The external controller can monitor the
transmitter writes its AKSV into the HDCP registers of the ADV7604.
Note: The external controller can monitor the
upstream transmitter has written its AKSV into the HDCP registers of the ADV7604. An interrupt
(refer to Section 14.1) can also be enabled for an AKSV update event. AKSV_UPDATE_ST (IO
Map, Address 0x7A[5]) is set to 1 when an interrupt is triggered for this event.
AKSV_UPDATE_RAW, IO Map, Address 0x79 [5]
Function
AKSV_UPDATE_RAW
0
1
7.20.2.4 Second and Subsequent AKSV Updates
When the upstream transmitter writes its AKSV for the second time or more into the ADV7604
HDCP registers, the external controller driving the ADV7604 should set
Rev. F August 2010
bit (i.e. BCAPS[6]):
bit is set to 0, the KSV FIFO read from the HDCP port always returns
bit is set to 1, the KSV FIFO read from the HDCP port matches the
Table 30) with the KSV from the transmitter on the back end of
to 1.
AKSV_UPDATE_RAW
AKSV_UPDATE_RAW
Description
Transmitter has not written its AKSV into HDCP registers of
ADV7604.
Transmitter has written its AKSV into HDCP registers. Reset by
setting AKSV_UPDATE_CLR (IO Map, Address 0x79[5]) to 1.
176
ADV7604
Table 30)
bit to be notified when the
flag to find out when the
KSV_LIST_READY to 1.