2246 power on sequence – Sensoray 2246 User Manual
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hard coded, the API re-programs the video source register (0x02) after loading the
ENC*.INI file.
NOTE: Since the 2246 API uses the xx.INI files for programming the 2246, changes
made to DEC_NC.INI and ENC_NC.INI must be restored before running the
application (calling the API).
2246 Power On Sequence
The 2246 contains on board LED’s that indicate power and status.
LED’s D11, D12, D15, D17, and D18 indicate the presence of board voltages 5v,
3.3v, 1.2v, 2.5v, and 1.8v respectively.
After Power on, LED D16 will light up indicating that all power lines are OK.
Following power on, the 2246’s USB controller will start looking for a connection
to the host computer. LED’s D1, D2, D3, D4, D5, D19, D20 on the 2246 indicate
the status of the USB and the status of the Host computer’s Windows driver’s.
Table-1 describes the LED sequence seen when Windows loads the 2246 USB
drivers.
MPEG
USB
SYNC
MPEG
USB
ERR
FPGA
USB
SYNC
FPGA
USB
ERR
MPEG
USB
LOAD
FPGA
PROG
LOAD
FPGA
PROG
LOAD
D1
D2
D3
D4
D5
D19
D20
-
-
-
-
-
-
-
No Driver loaded. USB chips -Blank-
-
-
D3
-
-
-
-
Windows Load FPGA USB with USB ID 1
D1
-
D3
-
-
-
-
Windows Load MPEG USB with USB ID 2
D1
-
D3
-
D5
-
-
MPEG ID Program lights D5
-
-
-
-
D5
-
-
Windows re-loading drivers for new USB
ID's
-
-
D3
-
D5
-
-
FPGA/Control driver loaded
-
-
D3
-
D5
D19
D20
FPGA initialization done and running
D1
-
D3
-
D5
D19
D20
MPEG/Streaming USB driver loaded
Table-1
Note:
When Windows first sees the 2246 via the USB connection (either when the USB
is plugged in for the first time or when the USB cable is moved to a new port),
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