AK8825 Datasheet, PDF (67/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(2) Slave Synchronization mode
[AK8825]
AK8825 can make synchronization using HSYNC/VSYNC timing.
The coming HSYNC is used for synchronization for horizontally, and VSYNC is used for Line-Sync.
The falling edge of the each timing signal is used for Synchronization.
Synchronization timing is AK8825 original timing and the timing defined in CEA861-D standard.
Timing is set by the register (HDCEA861-bit of HD mode Register [Sub Address 0x00].
HD Mode Register
Sub Address 0x00
bit 7
bit 6
HDCBG
HDBBG
bit 5
HDSETUP
bit 4
bit 3
HDEAVDEC HDCEA861
bit 2
HDMODE1
default Value 0x00
bit 1
bit 0
HDMODE0 HDRFRSH
HDCEA861-bit
HDCEA861D
0
1
Sync-timing
AK8825 Sync timing
CEA-861-D Sync-timing
Note
The AK8825 recognizes 1st/2nd Field to watch the relation between HSYNC and VSYNC falling edge.
Rev-E-00
67
2008/03