Input Status - Analog Devices ADV7850 Hardware Manual

Function
sdp_video_detected
1
0 
sdp_c_chan_active, Addr 90 (SDP), Address 0x54[5] (Read Only)
This readback displays the result of the CVBS/YC detection feature.
Function
sdp_c_chan_active
1
0 
sdp_pr_detected_in_sd, Addr 90 (SDP), Address 0x58[6] (Read Only)
This readback indicates the detection of a progressive input to the SD core.
Function
sdp_pr_detected_in_sd
1
0 

Input Status

6.4.3
The sdp_STATUS_INPUT_TYPE_1 register consists of the following fields.
sdp_hswitch_present, Addr 90 (SDP), Address 0x56[7] (Read Only)
This readback displays the result of head switch detection using algorithm 1.
Function
sdp_hswitch_present
1
0 
sdp_blk_nstd, Addr 90 (SDP), Address 0x56[6] (Read Only)
This readback displays the length of a 192 line block of pixels in clock cycles if within the set threshold.
Function
sdp_blk_nstd
1
0 
sdp_fld_nstd, Addr 90 (SDP), Address 0x56[5] (Read Only)
This readback indicates if the field length in clock cycles is within the threshold set by sdp_frm_nstd_thr of a nominal value.
Function
sdp_fld_nstd
1
0 
Rev. A May 2012
Description
Indicates valid SD/PR video input detected
Input invalid or no input connected
Description
Y/C input detected
CVBS input detected
Description
SDP detects progressive input
Normal operation
Description
Head switch detected by algorithm 1
Head switch not detected by algorithm 1
Description
Length of 192 line block of pixels in clock cycles not within +- sdp_frm_nstd_thr of nominal
value
Length of 192 line block of pixels in clock cycles within +- sdp_frm_nstd_thr of nominal value
Description
Field length in clock cycles not within +- sdp_frm_nstd_thr of nominal value
Field length in clock cycles within +- sdp_frm_nstd_thr of nominal value
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ADV7850