User`s manual

100-M0070X2 13 of 26
www.cobham.com/gms
The DDPC has a Micro-controller and an FPGA that can do highly complex computations. Its
ability to accept and produce serial ASI and 44 I/O data pins make it a most versatile tool.
The DDPC is protected with a 1 amp resettable fuse. The board is designed to accept 9-15 VDC
input power. Power consumption is application dependant. Refer to application. The internal
logic diagram is shown in figure 6.
Digital Data Processor Card (DDPC)
FPGA
XILINX
SPARTAN 3(E)
XC3S200
ASI
Serial to
Parallel
Interface
ASI
Parallel to
Serial
Interface
ASI
Microprocessor
ASI IN
J1
I^2C
CNTRL
Parallel I/O
USB
CNTRL
RS232RS232
DATA
CNTRL
CNTRL
DATA
FEED
BACK
DDR RAM
1MX16X4
22 LVDS OR 44 TTL
GENERAL PURPOSE I/O
ASI OUT
FLASH 4MB
XCF04S
12V
RESET
I^2C
Figure 7 Internal Logic Diagram
The DDPC fits into any slot in the MSR except #1 if diversity tuners are loaded. The MSR’s
“switched 12 VDC” must be turned on for the card slot that the DDPC is in. The MSR can talk to
the DDPC through the 80-pin connector via I2C port on the connector.
5.1 DDPC CONNECTION DIAGRAM
Figure 7 shows a comprehensive connection diagram for the DDPC. See section 4.1 for
individual configuration setups. In the following section will explain the connections and the
LEDs used by the DDPC.
DVB ASI IN
BNC
DIG I/O
COMPUTER
DDP
CARD
HIGH SPEED DATA OUT
CONTROL AND USER DATA
DVB ASI OUT
MSR
DECODER/VIDEO
USB BNC
RS-232
CONTROL
10 Pin
50 Pin
Figure 8 DVB ASI in/out and Data/Control diagrams
5.2 DDPC BACK PANEL
Located on the back panel are all interface connectors (two RS-232, USB, ASI IN/OUT and 50
pin LVDS/LVTTL) and two status LED indicators (System Active and Function Active). See
Figure 5 Rear View for their location.