VV5409C001 View Datasheet(PDF) - Vision
Part Name
Description
MFG CO.
'VV5409C001' PDF : 39 Pages View PDF
VV5409 CMOS Monochrome Sensor Datasheet (Restricted) Rev 1.0
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At least 16 CLKI clock periods after CLKI has been enabled the host controller must send
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.
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On detecting 32 consecutive FFH (FH) values on the data bus, the Video Processor sets
the no_camera low.
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Initiate the Auto-load Daisy-Chain (only where a VISION co-processor is used) to read
setup data and the sensor defect map from the appropriate serial E2PROMs into the
sensor and co-processor.
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Video Processor disables the sensor clock, CLKI.
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Video Processor generates the VP_Ready interrupt.
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The host software services the VP_Ready interrupt.
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Host issues command to remove sensor from low-power mode. co-processor/host
controller enables the sensor clock, CLKI.
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At least 16 CLKI clock periods after CLKI has been enabled the host controller must send
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 outputting
valid video data.
Table 5.5 : System Power-Up or Hot-plugging Device Behaviour
5.6.1 Power-Up/Down (Figure 5.18)
There are two options:
1. Sensor starts running on power-up.
2. Sensor enters low-power after power-up.
The choice of which state the sensor is in on power-up depends of the values of the mode select pins on
power-up
When the sensor starts running on power-up, the power-up sequence is as follows:
1. One field of a continuous stream of alternating 9H and 6H values on the data bus. By locking onto the
resulting 0101/1010 patterns appearing on the data bus lines the video processor can determine the
best sampling position for the video data stream.
2. 3 Fields of constant FF H (F H) on the data bus
3. 4 Fields after power-up valid video data in generated.
In the case of the sensor entering low-power mode on power-up, the sequence to exit low power-mode is as
follows.
On power-up all of the data bus lines will go high Immediately FF H (F H) to indicate that the device is “present”
and the device enters it low-power mode (Section 5.6.2).
When the Video Processor is reset the following sequence should be executed to ensure that the VM5409
starts to generate video data:
1. After the Video Processor has been released from reset, the sensor clock, CLKI, should be enabled
immediately
2. After waiting for at least 16 CLKI clock cycles, a “Soft Reset” command should be issued to the sensor.
This is necessary to ensure that the sensor is brought into a known state. If the sensor is not present
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VV5409 CMOS Monochrome Sensor Datasheet (Restricted) Rev 1.0
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