Processing Analog Front End Interrupts - Analog Devices ADV7850 Hardware Manual

Function
sdp_burst_locked_st
0 
1
sdp_video_detected_st, IO, Address 0x9D[0] (Read Only)
This readback indicates the latched status for the SDP video detected interrupt signal. Once set, this bit remains high until the interrupt
is cleared via sdp_video_detected_clr. This bit is only valid if enabled via the corresponding INT1 or INT2 interrupt mask bit.
Function
sdp_video_detected_st
0 
1

Processing Analog Front End Interrupts

15.5.7
The analog front end (AFE) contains eight trilevel slicers. The inputs to trilevel slicers 1 to 4 are the trilevel signals received on pins TRI1
to TRI4 respectively. Pins HS_IN1/TRI5, VS_IN1/TRI6, HS_IN2/TRI7 and VS_IN2/TRI8 can be configured to receive trilevel signals and
these inputs are sliced on slicers 5, 6, 7 and 8 respectively.
Each trilevel slicer has two digital outputs, one for each slice level. An edge on any of the outputs from the trilevel slicers will be captured
as an interrupt. These interrupts are located in AFE Map, addresses 0x1B and 0x1C. Each interrupt signal has a separate mask and clear
signal available to the user. These are located in the AFE Map, addresses 0x17 to 0x1A. Refer to the ADV7850 Software Manual, AFE Map
section, for more details.
The status flags from each of the eight trilevel slicers are or' e d together and the result is captured as an interrupt in the IO Map. The
rix_status bits need to be cleared before the AFE interrupt can become valid again.
processing the trilevel interrupts.
Rev. A May 2012
Description
No change, interrupt not generated
sdp_burst_locked_raw changed and generated interrupt
Description
No change, interrupt not generated
sdp_video_detected_raw changed and generated interrupt
Figure 148 details the recommended method of
425
ADV7850