Analog Devices Linear Technology DC2085 Demo Manual page 4

DEMO MANUAL DC2085
QUICK START PROCEDURE
the JTAG position the J9 is used with a JTAG programmer
to program the FPGA. (Default: SPI or down)
Connectors
J1: DC590. This is an optional header that can be used
to program the DAC with the DC590. (Default: removed)
J9: JTAG. This is an optional header that can be used to
program the FPGA through a JTAG programmer. (Default:
removed)
J7: USB. Connect a USB cable from J7 to a computer with
the LTDACGen software installed.
J10 & J11: HSMC Connectors. These connectors are
designed to connect to the Altera Stratix IV development
board. All of the communication between the FPGA and
the DAC is routed through these connectors.
APPLYING POWER AND SIGNALS TO THE DC2085
DEMONSTRATION CIRCUIT
If a Stratix IV demo board is used to supply data to the
DC2085, the two boards should first be bolted together
4
and a proper connection should be made. If Linear Tech-
nology provided the Stratix IV board the proper bit file is
already installed in flash memory and will begin to operate
when the board is powered on. If an unprogrammed FPGA
board is used, refer to the appropriate documentation on
how to program it.
Power should be applied to the system in this order:
1. Connect the Altera board to the provided power supply.
2. Connect the USB cable to J7.
3. Apply a clock to J4.
4. Connect any optional output board to J5 and J6.
5. Turn on the voltage to the Altera board.
6. Connect the 5V from a bench supply to the +5V turret
on the DC2085.
7. Open the LTDACGen software and hit connect.
LTDACGen should report back that it is connected to the
FPGA. See Figure 2:
Figure 2. LTDACGen Connected to FPGA
dc2085afb