Analog Devices ADV7850 Hardware Manual page 175

Function
field1_total_height[13:
0]
00000000000000 
xxxxxxxxxxxxxx
field1_height[12:0], Addr 68 (HDMI), Address 0x0B[4:0]; Address 0x0C[7:0] (Read Only)
This readback displays the number of active lines in field 1. Field 1 height is a vertical filter measurement. This readback gives the
number of active lines in field. This measurement is valid only when the vertical filter has locked. Field 1 height is a vertical filter
measurement.
Function
field1_height[12:0]
0000000000000 
xxxxxxxxxxxxx
field1_vs_front_porch[13:0], Addr 68 (HDMI), Address 0x2C[5:0]; Address 0x2D[7:0] (Read Only)
This readback displays the total number of half lines in the VSync front porch of Field 1. The Field 1 VSync front porch width is a
vertical synchronization measurement. The unit of this measurement is half lines. This measurement is valid only when the vertical
filter has locked.
Function
field1_vs_front_porch[1
3:0]
00000000000000 
xxxxxxxxxxxxxx
field1_vs_pulse_width[13:0], Addr 68 (HDMI), Address 0x30[5:0]; Address 0x31[7:0] (Read Only)
This readback displays the total number of half lines in the VSync pulse of Field 1. The Field 1 VSync width is a vertical synchronization
measurement. The unit for this measurement is half lines. This measurement is valid only when the vertical filter has locked.
Function
field1_vs_pulse_width[
13:0]
00000000000000 
xxxxxxxxxxxxxx
field1_vs_back_porch[13:0], Addr 68 (HDMI), Address 0x34[5:0]; Address 0x35[7:0] (Read Only)
This readback displays the total number of half lines in the VSync back porch of Field 1. The Field 1 VSync back porch width is a
vertical synchronization measurement. The unit for this measurement is half lines. This measurement is valid only when the vertical
filter has locked.
Rev. A May 2012
Description
Total number of half lines in Field 1 (divide readback by 2 to get number of lines)
Total number of half lines in Field 1 (divide readback by 2 to get number of lines)
Description
Number of active lines in Field 1
Number of active lines in Field 1
Description
Total number of half lines in VSync front porch of Field 1 (divide readback by 2 to get number
of lines)
Total number of half lines in VSync front porch of Field 1 (divide readback by 2 to get number
of lines)
Description
Total number of half lines in VSync pulse of Field 1 (divide readback by 2 to get number of
lines)
Total number of half lines in VSync pulse of Field 1 (divide readback by 2 to get number of
lines)
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ADV7850