AK8825 Datasheet, PDF (22/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(5-3) Setting to Component Video Encoder mode after power-up
After initializing with PDN-pin = Low, AK8825 is Composite Video Encoder mode.
Set to Component Video Encoder mode by register setting. (Set CONVMOD[1:0]-bit =[01])
(r) Shows Register-bit
Power
Supply
PDN
CLKIN
PLLPDN (r)
CONVMOD[1:0] (r)
DTRSTN (r)
Register set (r)
DACnEN (r)
DATA
t >100ns ⁽¹⁾
27MHz or 74.25MHz
t>100clk ⁽²⁾
(3)
0x00
(4)
0x01
31 ms (5)
t>30 ms ⁽⁶⁾
[AK8825]
AVDD:2.7V
DVDD:1.65V
PVDD:1.65V
Fig. 14 Power-Up sequence (To set Component Video Encoder mode after power-up)
(1)
(2)
(3)
(4)
(5)(6)
PDN-pin should be Low states more than 100ns after power-up.
Set to Component Video Encoder mode after 100clock count with Clock Input to CLKIN-pin.
PLLPDN-bit should be set to High after setting Component Video Encoder mode.
DTRSTN-bit shoud be set to High after setting component Video Encoder mode.
After setting PLLPDN -bit = High, wait more than 31ms, then set DAC ON.
Rev-E-00
22
2008/03