ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 21

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

(5-2) Setting to Composite Video Encoder mode after power-up
After initializing with PDN-pin = Low, AK8825 is Composite Video Encoder mode.
Rev-E-00
(r) : Register-bit
CONVMOD[1:0] (r)
Register set (r)
DTRSTN (r)
DACnEN (r)
PLLPDN (r)
Supply
Power
CLKIN
Fig. 13 Power-Up sequence (To set Composite Video Encoder mode after power-up)
DATA
(1) PDN-pin should be Low states more than 100ns after power-up.
(2) To initialize in Composite Video Encoder Block. Clock input is ncessary to CLKIN-pin.
(3) BT656 Interface mode operation, it is more than 1-Frame periode to synchronize with input
PDN
DTRSTN-bit should be 0 more than 100clock count.
data. To avoid displaying noise etc, DAC should be ON after synchronization.
t >100ns
t > 100clk
(1)
(2)
0x00
21
t > 30ms
(3)
27MHz
DVDD:1.65V
PVDD:1.65V
AVDD:2.7V
2008/03
[AK8825]