VV6501 datasheet(26/60 Pages) STMICROELECTRONICS

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Functional Description

VV6501

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3.4

Device operating modes

3.4.1

Power-up

On power up the sensor is in low-power mode. All data bus lines drive high to indicate that the

device is “present”.

3.4.2

Waking up the sensor

The sensor is made to exit low power mode by enabling the external clock and writing to SIF

register16 bit 0. The first frame output after exiting low-power mode does not contain any valid video

data.

3.4.3

Low power mode

Entering low-power mode during video streaming causes the analogue circuits to be powered

down. The values of the serial interface registers is preserved.

Figure 21: Exiting low-power mode

D[4:0]

CLKIN

Frame

number

SDA

SCL

Start of frame line for the 1st

frame of valid video data.

Valid video data.

setup0[0]

LP1

D[4:0] are set to FH and the sensor analogue circuitry is

powered down.

LP2-LP3

“Exit low power mode” command.

Powers-up analogue circuits and initiates the 1 frame

start-up sequence

LP3-LP4

1 frame of alternating 9H & 6H data on D[4:0]

The sensor is being initialized during this frame.

One frame of 9H & 6H data.

9H,6H,9H,6H...

VV6501 Datasheet(PDF) 26 Page - STMicroelectronics