VV5404 datasheet(17/54 Pages) STMICROELECTRONICS

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VV5404 & VV6404

CD5404-6404F-A

17/54

PU0

System Power Up or Sensor Hot Plugged

PU1

Sensor Internal-on Reset Triggers, the sensor enters low power mode and D[3:0] is set

to FH.

PU2

Video Processor released from reset.

PU3

Video Processor enables the sensor clock, CLKI.

PU4-PU5

At least 16 CLKI clock periods after CLKI has been enabled the VP sends a “Soft-Reset”

command to the sensor via the serial interface. This ensures that if a sensor is present

then it is in low-power mode.

PU6

On detecting 32 consecutive FH values on D[3:0], the Video Processor sets the

no_camera low.

PU7-PU8

If present, upload the sensor defect map from E2PROM into the Video Processor

PU9

Video Processor disables the sensor clock, CLKI.

PU10

Video Processor generates the VP_Ready interrupt.

PU11

The host software services the VP_Ready interrupt.

PU12

Host issues command to remove sensor from low-power mode. VP enables the sensor

clock, CLKI.

PU13-PU4

At least 16 CLKI clock periods after CLKI has been enabled the VP sends the “Exit Low-

Power Mode” command to the sensor via the serial interface. This initiates the sensors

4 frame start sequence.

PU15-PU16

One frame of alternating 9H & 6H data on D[3:0] for the video processor to determine the

best sampling phase for the nibble data (D[3:0]).

PU17-PU18

4 Frames after the “Exit Low-Power Mode” serial comms, the sensor starts outputing

valid video data.

Table 7 : System Power-Up or Hot-plugging Device Behaviour

VV5404 датащи(PDF) 17 Page - STMicroelectronics