ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 40

• Manufacturer Part Number: ak8825
• Description: Hd/sd Multi Format Video Encoder With 3ch Dac
• Manufacturer: AKM Semiconductor, Inc.

■ On chip out-put limiter
Component Video Encoder mode and SDCLPLVL[1:0]-bit of SD Block Delay Register (R/W) [Sub Address 0x13] in Composite
Video Encoder mode.
HD VBI & Clip Level Control Register
Sub Address 0x01
SD Block Delay Register
Sub Address 0x13
The Limit level defined as this table.
■ Black Burst Signal Generation Function
SD Block Control Register (R/W) [Sub Address 0x11] is set to “1”, same operation is processed as in the case when the
fixed-16 Luminance signal and the fixed-Cb/Cr signal outputs are input. In this case when setup-bit is “ON”, set-up process is
done and when it is “OFF”, no set-up process is made.
HD Mode Register
Sub Address 0x00
SD Block Control Register
Sub Address 0x11
Rev-E-00
HDCLPLVL1
SDCLPLVL1
Limiter function is performed on signals which exceed Pedestal Level.
Limiter Levels are set at “no limiter”, “- 1.5IRE”, “- 7IRE”.
The limit level is set with HDCLPLVL[1:0]-bit of HD VBI & Clip Level Control Register (R/W) [Sub Address 0x01] in
The AK8825can output Black Burst Signal (Black Level Output).
When HDBBG-bit of HD Mode Register (R/W) [Sub Address 0x00] in Component Video Encoder mode, SDBBG-bit of
HDCBG
SDBBG
HDCLPLVL[1:0]-bit
SDCLPLVL[1:0]-bit
bit 7
bit 7
bit 7
bit 7
00
01
10
11
HDCLPLVL0
SDCLPLVL0
HDBBG
SDCBG
bit 6
bit 6
bit 6
bit 6
no Clipping
Clipped at -7.0 IRE Level
Clipped at -1.5 IRE Level
Reserved
HDSETUP
SDSETUP
Reserved
SYD2
bit 5
bit 5
bit 5
bit 5
Under-shoot Limit Level
HDEAVDEC
Reserved
SYD1
SCR
bit 4
bit 4
bit 4
bit 4
40
HDCEA861
Reserved
SDVM3
SYD0
bit 3
bit 3
bit 3
bit 3
HDVUNMSK
HDMODE1
Reserved
SDVM2
bit 2
bit 2
bit 2
bit 2
HDMODE0
Reserved
SDVM1
HDVL1
bit 1
bit 1
bit 1
bit 1
Default Value 0x10
default Value 0x00
default Value 0x04
default Value 0x00
HDRFRSH
Reserved
SDVM0
HDVL0
bit 0
bit 0
bit 0
bit 0
2008/03
[AK8825]