AR0833 Datasheet, PDF (14/64 Pages) ON Semiconductor – 8 Mp CMOS Digital Image Sensor

AR0833: 1/3.2-Inch 8 Mp CMOS Digital Image Sensor
Power Down Sequence
Power Down Sequence
The recommended power-down sequence for the AR0833 is shown in Figure 6. The three
power supply domains (1.2 V, 1.8 V, and 2.8 V) must have the separation specified below.
1. Disable streaming if output is active by setting standby R0x301a[2] = 0.
2. After disabling the internal clock EXTCLK, disable XSHUTDOWN.
3. After XSHUTDOWN is LOW disable the 2.8 V/1.8 V supply.
4. After the 2.8 V/1.8 V supply is LOW disable the 1.2 V supply.
5. After the 1.2 V supply is LOW disable the VDD_IO supply.
Figure 6: Recommended Power-down Sequence
VAA, VAA_PIX
DVDD_1V8
DVDD_1V2,
DVDD_1V2_PHY
t₁
t₂
t₃
VDD_IO
EXTCLK
XSHUTDOWN
Streaming ^{Focal Planes}
Deactivation
SDATA
SCLK
Soft Standby
t₀
Hard Reset
Turn Off Power Supplies
Table 8:
Power-down Sequence
Definition
EXTCLK to XSHUTDOWN
XSHUTDOWN to supply 2.8 V/1.8 V
Supply 2.8 V/1.8 V to supply 1.2 V
Supply 1.2 V to VDD_IO
Symbol
t₀
t₁
t₂
t₃
Minimum
Typical
Maximum
Unit
100
–
–
s
200
–
–
s
0
200
–
s
200
–
–
s
AR0833_DS Rev. H Pub. 4/15 EN
14
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