134
www.xilinx.com
Spartan-3A/3AN FPGA Starter Kit Board User Guide
UG334 (v1.1) June 19, 2008
Chapter 16:
Miniature Stereo Audio Jack
R
FPGA Connections
The FPGA drives a 3.3V digital signal to each side of the audio jack, as indicated in
Table 16-1
. A monophonic connector only uses the left-side channel
UCF Location Constraints
Figure 16-3
provides the UCF constraints for the audio connector.
Related Resources
The demonstration design shipped with the board includes an audio example.
•
Spartan-3A/3AN Starter Kit Demo Design Overview
www.xilinx.com/products/boards/s3astarter/reference_designs.htm#demo
•
Restoring the “Out of the Box” Flash Programming
www.xilinx.com/products/boards/s3astarter/reference_designs.htm#out
Figure 16-2:
Examples of Miniature Stereo Jacks
1/4”
2.5 mm
(6.3 mm)
1/8”
(3.5 mm)
Monophonic
Stereophonic
(left channel only)
(two insulator bands)
(one insulator band)
UG330_c16_02_021507
Table 16-1:
Digital Outputs to Stereo Minijack
Signal Name
FPGA Pins
Stereo Jack
Mono Jack
AUD_L
Y10
Left-side audio
Audio channel
AUD_R
V10
Right-side audio
Drive to Hi-Z
Figure 16-3:
UCF Constraints for Audio Connector
# Controls VCCAUX supply rail (IC19)
NET
"AUD_L"
LOC
= "Y10" |
IOSTANDARD
= LVCMOS33 |
DRIVE
= 8 |
SLEW
= SLOW ;
NET
"AUD_R"
LOC
= "V10" |
IOSTANDARD
= LVCMOS33 |
DRIVE
= 8 |
SLEW
= SLOW ;
