AR0835HS datasheet(15/70 Pages) ONSEMI

15 / 70 page

AR0835HS_DS Rev. D Pub. 5/15 EN

©Semiconductor Components Industries, LLC, 2015.

AR0835HS: 1/3.2-Inch 8 Mp CMOS Digital Image Sensor

Power Down Sequence

Hard Standby and Hard Reset

The hard standby state is reached by the assertion of the XSHUTDOWN pad (hard reset).

values once hard reset is completed. The minimum power consumption is achieved by

the hard standby state. The details of the sequence are described below and shown in

Figure 7.

1. Disable streaming if output is active by setting mode_select 0x301A[2] = 0.

2. The soft standby state is reached after the current row or frame, depending on config-

uration, has ended.

3. Assert XSHUTDOWN (active LOW) to reset the sensor.

4. The sensor remains in hard standby state if XSHUTDOWN remains in the logic “0”

state.

Figure 7:

Hard Standby and Hard Reset

Soft Standby and Soft Reset

The AR0835HS can reduce power consumption by switching to the soft standby state

when the output is not needed. Register values are retained in the soft standby state. The

details of the sequence are described below and shown in Figure 8 on page 16.

Soft Standby

1. Disable streaming if output is active by setting mode_select 0x301A[2] = 0.

2. The soft standby state is reached after the current row or frame, depending on config-

uration, has ended.

Soft Reset

1. Follow the soft standby sequence list above.

2. Set software_reset = 1 (R0x3021) to start the internal initialization sequence.

3. After 2400 EXTCLKs , the internal initialization sequence is completed and the current

state returns to soft standby automatically.

EXTCLK

mode_select

R0x0100

XSHUTDOWN

Logic “1”

Logic “0”

Streaming

Soft Standby

Hard Standby

Hard Reset

next row/frame

AR0835HS Datasheet(PDF) 15 Page - ON Semiconductor