AK8825 Datasheet, PDF (41/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

■ Color Bar Signal Generation Function
[AK8825]
The AK8825 can output 100% Color Bar Signal. Color Bar Signal is output by setting HDCBG-bit of HD Mode Register (R/W)
[Sub Address 0x00] in Component Video Encoder mode and SDCBG-bit of SD Block Control Register (R/W) [Sub Address
0x11] in Composite Video Encoder mode to “1”.
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
SD Block Control Register
Sub Address 0x11
bit 7
bit 6
SDBBG
SDCBG
bit 5
SDSETUP
bit 4
SCR
bit 3
SDVM3
bit 2
SDVM2
Default Value 0x10
bit 1
bit 0
SDVM1
SDVM0
■ Setup Process Function
In the AK8825, a 7.5% set-up can be added by Register.
In Component Video Encoder mode, HDSETUP-bit of HD Mode Register (R/W) [Sub Address 0x00] is the control bit of this
function and , in composite Video Encoder mode, SDSETUP-bit of SD Block Control Register (R/W) [Sub Address 0x11] is the
control bit of this function
This bit is enabled at Color-bar Generator mode and Black Burst Generator mode.
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
SD Block Control Register
Sub Address 0x11
bit 7
bit 6
SDBBG
SDCBG
bit 5
SDSETUP
bit 4
SCR
bit 3
SDVM3
bit 2
SDVM2
Default Value 0x10
bit 1
bit 0
SDVM1
SDVM0
Rev-E-00
41
2008/03