Datasheet

AD9880
Rev. 0 | Page 24 of 64
Hex
Address
Read/Write
or Read Only
Bits
Default
Value
Register Name Description
0x12 Read/Write [7] 1******* Input Hsync Polarity 0 = active low.
1 = active high.
[6] *0******
Hsync Polarity
Override
0 = auto Hsync polarity.
1 = manual Hsync polarity.
[5] **1***** Input Vsync Polarity 0 = active low.
1 = active high.
[4] ***0****
Vsync Polarity
Override
0 = auto Vsync polarity.
1 = manual Vsync polarity.
[3] ****1*** Input Coast Polarity 0 = active low.
1 = active high.
[2] *****0**
Coast Polarity
Override
0 = auto Coast polarity.
1 = manual Coast polarity.
[1] ******0* Coast Source 0 = internal Coast.
1 = external Coast.
[0] *******1 Filter Coast Vsync 0 = Use raw Vsync for Coast generation.
1 = Use filtered Vsync for Coast generation.
0x13 Read/Write [7:0] 00000000 Precoast Number of Hsync periods before Vsync to Coast.
0x14 Read/Write [7:0] 00000000 Postcoast Number of Hsync periods after Vsync to Coast.
0x15 Read [7] 0******* Hsync 0 Detected 0 = not detected.
1 = detected.
[6] *0****** Hsync 1 Detected 0 = not detected.
1 = detected.
[5] **0***** Vsync 0 Detected 0 = not detected.
1 = detected.
[4] ***0**** Vsync 1 Detected 0 = not detected.
1 = detected.
[3] ****0*** SOG 0 Detected 0 = not detected.
1 = detected.
[2] *****0** SOG1 Detected 0 = not detected.
1 = detected.
[1] ******0* Coast Detected 0 = not detected.
1 = detected.
0x16 Read [7] 0******* Hsync 0 Polarity 0 = active low.
1 = active high.
[6] *0****** Hsync 1 Polarity 0 = active low.
1 = active high.
[5] **0***** Vsync 0 Polarity 0 = active low.
1 = active high.
[4] ***0**** Vsync 1 Polarity 0 = active low.
1 = active high.
[3] ****0*** Coast Polarity 0 = active low.
1 = active high.
[2] *****0**
Pseudo Sync
Detected
0 = not detected.
1 = detected.
[1] ******0* Sync Filter Locked 0 = not locked.
1 = locked.
[0] *******0 Bad Sync Detect 0 = not detected.
1 = detected.