ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 22

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

(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
Rev-E-00
CONVMOD[1:0] (r)
Register set (r)
DTRSTN (r)
DACnEN (r)
PLLPDN (r)
(1)
(2)
(3)
(4)
(5)(6)
Supply
Power
CLKIN
DATA
Fig. 14 Power-Up sequence (To set Component Video Encoder mode after power-up)
PDN
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.
0x00
t >100ns (1)
t>100clk
(2)
(3)
(4)
31 ms
22
27MHz or 74.25MHz
(5)
0x01
t>30 ms
(6)
DVDD:1.65V
PVDD:1.65V
AVDD:2.7V
2008/03
[AK8825]