VV0670P001 View Datasheet(PDF) - Vision
Part Name
Description
MFG CO.
'VV0670P001' PDF : 36 Pages View PDF
Colour Processor Interface ASIC
Pass-thru Port
Tests for short circuits and open circuits on the Pass-Through Parallel port. Requires a special loop back
connector to do the test, and so will fail if this is not present.
USB Core
Tests that the USB core has been succesfully configured. Does not check actual communications with host. If
the 48MHz Xtal is faulty, or starts up too slowly, this is test will fail. Because of this parallel port only designs
will always show this test as failing.
VC Register Test
Tests internal CPiA control signals - should never fail.
DRAM Access Test
Checks for correct CPiA access to DRAM. It does this by writing a test pattern to DRAM, and then verifying it.
VP Register Test
Tests internal CPiA control signals - should never fail.
Frame Grab Test
Tests internal CPiA control signals - should never fail.
VP Data Test
Puts VP module into Colour Bar Mode, and captures a test image to DRAM. Then verifys the correct data has
been captured. If DRAM Access test fails this test will also fail.
2.2.6.23 Debug output
If the DEBUG input is pulled LO, the Control Processor will output diagnostic information on the Serial UART
TX line. This output consists primarily of a trace of all the command and status data transactions that occur
over the host parallel port or USB interfaces. It was primarily designed to be of use for developers working on
the host driver software.
The serial format used is 19200 baud, 8-bit data, no parity, 1 stop bit, no flow control.
The following shows typical output following a system reset and then subsequent commands being received
from the host by the camera.
====== CPIA Ver 1-20 ======
Process loop ...
Detected PP i/f
Command = 01 CmdData = 00 00 00 00 DataIn = 01 14 01 00 A2 88 88 85
Command = 03 CmdData = 00 00 00 00 DataIn = 02 00 00 00 00 00 10 00
Command = 04 CmdData = 00 00 00 00
Command = A6 CmdData = 02 00 00 00
NOTE - When the debug output is enabled it significantly slows the handling of commands by the camera,
and thus the framerate acheived on the host will be much reduced.
V:\apps\cpia\docs\cpia datasheet\cpia_datasheet4.fm
02/07/98
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Commercial In Confidence
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