ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 24

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

(6) Power-Down Sequence and reset sequence after power-down release
Before setting to PDN=LOW, DTRSTN(r) should be Low to initialize.
After power-down release (PDN =LOW -> High), wait for 10ms for Analog Reference Voltage / Current becomes stable.
During PDN=Low (Power down States), either with clock-in or clock-not in is
During PDN = Low, AVDD / DVDD can be power-off.
Power down sequence is shown as Fig. 16. (r) means Register-bit.
PDN = Low makes AK8825 initialize condition, so that after power-down release, make sure register setting.
(6-1) Power-Down and power-down release Sequence from Composite Video Encoder mode
Rev-E-00
C O N V M O D [1:0](r)
D A C nE N (r)
D TR S TN (r)
(27M H z)
Fig. 16 Power-Down and power-down release Sequence from Composite Video Encoder mode
C LK IN
V R E F
P D N
0x00
t > 100clk
24
F ix to Low or H igh
R egister
necessary to set regsiter again
10m s
is
initialized,
2008/03
[AK8825]
it
is