AR0330 Datasheet, PDF (17/77 Pages) ON Semiconductor – CMOS Digital Image Sensor

AR0330: 1/3-Inch CMOS Digital Image Sensor
Sensor Initialization
Power-Down Sequence
The recommended power-down sequence for the AR0330 is shown in Figure 7. The
available power supplies (VDD_IO, VDD_HiSPi, VDD_HiSPi_TX, VDD_PLL, VDD_MIPI, VAA,
VAA_PIX) must have the separation specified below.
1. Disable streaming if output is active by setting standby R0x301a[2] = 0
2. The soft standby state is reached after the current row or frame, depending on config-
uration, has ended.
3. Turn off VDD_HiSPi_TX.
4. Turn off VDD_IO.
5. Turn off VDD and VDD_HiSPi
6. Turn off VAA/VAA_PIX.
7. Turn off VDD_PLL, VDD_MIPI.
Figure 7: Power Down
VDD_HISPI_TX (0.4)
V DD_IO (1.8/2.8)
VDD, VDD_HiSPi (1.8)
VAA_PIX, VAA (2.8)
VDD_PLL,
VDD_MIPI (2.8)
t0
t1
t2
t3
EXTCLK
t4
Power Down until next Power up cycle
Table 8:
Power-Down Sequence
Definition
VDD_HiSPi _TX to VDD_IO
VDD_IO to VDD and VDD_HiSPi
VDD and VDD_HiSPi to VAA/VAA_PIX
VAA/VAA_PIX to VDD_PLL
PwrDn until Next PwrUp Time
Symbol
t0
t1
t2
t3
t4
Minimum
0
0
0
0
100
Typical Maximum Unit
–
–
s
–
–
s
–
–
s
–
–
s
–
–
ms
Note:
t4 is required between power down and next power up time; all decoupling caps from regulators
must be completely discharged.
AR0330_DS Rev. U Pub. 4/15 EN
17
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