MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide
73
UG257 (v1.1) December 5, 2007
www.xilinx.com
UCF Location Constraints
R
DAC Outputs C and D
Equation 9-3
provides the output voltage equation for DAC outputs A and B. The
reference voltage associated with DAC outputs A and B is 2.5V
r
5%.
Equation 9-3
UCF Location Constraints
Figure 9-5
provides the UCF constraints for the DAC interface, including the I/O pin
assignment and the I/O standard used.
Related Resources
x
LTC2624 Quad DAC Data Sheet
x
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1155,C1005,C1156,
P2048,D2170
x
PicoBlaze Based D/A Converter Control for the Spartan-3E Starter Kit (Reference
Design)
x
http://www.xilinx.com/sp3e1600e
x
Xilinx PicoBlaze Soft Processor
x
http://www.xilinx.com/picoblaze
x
Digilent, Inc. Peripheral Modules
http://www.digilentinc.com/Products/Catalog.cfm?Nav1=Products&
Nav2=Peripheral&Cat=Peripheral
V
OUTC
D
11:0
>
@
4096
---------------------
2.5
V
5%
r
u
=
Figure 9-5:
UCF Location Constraints for the DAC Interface
NET "SPI_MISO" LOC = "N10" | IOSTANDARD = LVCMOS33 ;
NET "SPI_MOSI" LOC = "T4" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "SPI_SCK" LOC = "U16" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "DAC_CS" LOC = "N8" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "DAC_CLR" LOC = "P8" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
UG257_09_05_060606