AR0330 Datasheet, PDF (15/77 Pages) ON Semiconductor – CMOS Digital Image Sensor

AR0330: 1/3-Inch CMOS Digital Image Sensor
Sensor Initialization
Sensor Initialization
Power-Up Sequence
The recommended power-up sequence for the AR0330CS is shown in Figure 6. The
available power supplies (VDD_IO, VDD_PLL, VDD_MIPI, VAA, VAA_PIX) must have the
separation specified below.
1. Turn on VDD_PLL and VDD_MIPI power supplies
2. After 100s, turn on VAA and VAA_PIX power supply.
3. After 10s, turn on VDD power supply.
4. After 10s, turn on VDD_IO power supply.
5. After the last power supply is stable, enable EXTCLK.
6. Assert RESET_BAR for at least 1ms.
7. Wait 150,000 EXTCLK periods (for internal initialization into software standby.
8. Write R0x3152 = 0xA114 to configure the internal register initialization process.
9. Write R0x304A = 0x0070 to start the internal register initialization process.
10. Wait 150,000 EXTCLK periods
11. Configure PLL, output, and image settings to desired values.
12. Wait 1ms for the PLL to lock.
13. Set streaming mode (R0x301A[2] = 1).
Figure 6: Power Up
Notes:
1. A software reset (R0x301A[0] = 1) is not necessary after the procedure described above since a Hard
Reset will automatically triggers a software reset. Independently executing a software reset, should
be followed by steps seven through thirteen above
2. The sensor must be receiving the external input clock (EXTCLK) before the reset pin is toggled. The
sensor will begin an internal initialization sequence when the reset pin toggle from LOW to HIGH.
This initialization sequence will run using the external input clock. Power on default state is soft-
ware standby state, need to apply two-wire serial commands to start streaming. Above power up
sequence is a general power up sequence. For different interface configurations, MIPI, and Parallel,
some power rails are not needed. Those not needed power rails should be ignored in the general
power up sequence.
AR0330_DS Rev. U Pub. 4/15 EN
15
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