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SP305 Spartan-3 Development Platform User Guide
11
UG216 (v1.1) March 3, 2006
www.xilinx.com
Detailed Description
R
CPU Reset Button (10)
The CPU reset button is an active low push button intended to be used as a system or user
reset button. This button is wired to an FPGA I/O pin so it can also be used as a general
purpose button (see
Table 2-7
).
Reference
Designator
Label/Definition
FPGA Pin
FPGA CPU RESET
Program Switch (11)
When pressed, this switch grounds the Program pin of the FPGA. This clears the FPGA.
JTAG Configuration Port (12)
The JTAG configuration port for the board (J20) allows for device programming and FPGA
debug. The JTAG port supports the Xilinx Parallel Cable III or Parallel Cable IV products.
Third-party configuration products may also be available. The JTAG chain may also be
extended to an expansion board by setting jumper J26 accordingly. See the
“Configuration
Options,” page 11
section for more information.
Configuration Options
The FPGA on the SP-305 Development Platform can be configured through JTAG by 2
devices:
•
Parallel Cable IV cable (JTAG)
•
Platform Flash memory
The following section provides an overview of the possible ways the board can be
configured.
DS13
LED West
Green
F2
DS12
LED Center
Green
H7
Table 2-6:
User LED Connections
(Continued)
Reference
Designator
Label/Definition
Color
FPGA Pin
Table 2-7:
CPU Reset Connections
SW10
G2