ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 30
ak8825
Manufacturer Part Number
ak8825
Description
Hd/sd Multi Format Video Encoder With 3ch Dac
Manufacturer
AKM Semiconductor, Inc.
Datasheet
1.AK8825.pdf
(162 pages)
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(2) Composite Video Encoder mode to Component Video Encoder mode
Rev-E-00
Fig. 22 Mode Switching sequence (Composite Video Encoder mode to Component Video Encoder mode)
CONVMOD[1:0]-bit (r)
Register Setting (r)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10) Turn ON DACs after more than 30ms later
DACnEN-bit (r)
PLLPDN-bit (r)
SDBB-bit (r)
It is allows that changing clock without stopping clock input, however Process (6), (7) should
Be done before clock change.
To avoid making noise, Black Burst Generator is On, then stop inputting data.
Turns OFF DACs.
Black Burst Generator OFF.
Stop Clock Input to CLKIN pin.
Mode Change from Composite Video Encoder mode to Component Video Encoder mode.
Set Sync-mode, Output Signal etc.
Chang clock, if necessary.
After Input Clock becomes stable, Internal PLL makes power-up. (PLLPDN-bit =1)
After PLL becomes stable, starting input video data.
Data Input
CLKIN
Composite Video Encoder mode
(1)
Input
(2)
0x01
(3)
30
Low or High
(4)
Low or High
(5)
(6)
Component Video Encoder mode
(7)
(8)
t > 1 ms
0x00
(9)
(10)
t >30ms
Input
2008/03
[AK8825]
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