Board Power - Xilinx Spartan-3A User Manual

Board Power

Table 18: FPGA Configuration Mode Jumper (JP9) Settings
Master Serial
Master Serial
Slave Serial
Slave Serial
Master SPI
Master SPI
BPI Up
BPI Up
Slave Parallel
Slave Parallel
JTAG
JTAG
X-Ref Target - Figure 10
Board Power
A 5V, 6A, RoHS compliant wall transformer is sufficient to power the board for the
majority of applications. Power is supplied via barrel jack J5. A Texas Instruments TPS3828
supervisor monitors the incoming +5V power and holds all power conversion off until
incoming power is stable.
signal goes high after stable +5V is applied (CH1). Channels 2, 3 and 4 (3.3V, 2.5V and 1.2V)
are allowed to function by the TPS3828 200ms after PTH_INH# goes high. Slide switch
SW1 inhibits conversion until set to "ON". Texas Instruments PTH05050WAZ 6A power
modules are utilized to create the +2.5V and +3.3V power rails. The +1.2V power rail
(VCC_INT) is produced by a Texas Instruments PTH04000WAZ 3A power module. These
switching converters can exhibit switching spikes in the 650 kHz – 750 kHz region;
www.BDTIC.com/XILINX
54
PC
Mode
Pullup
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Figure 10: Configuration Jumpers (JP9)
Figure 11
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Configuration Mode Jumpers
5-6 (M2) 3-4 (M1)
Closed Closed
Closed Closed
Open Open
Open Open
Closed Closed
Closed Closed
Closed Open
Closed Open
Open Open
Open Open
Open Closed
Open Closed
Pulled High
shows the action of the TPS3828 where the PTH_INH#
Spartan-3A DSP Starter Platform User Guide
1-2 (M0) 7-8 (PUDC_B)
Closed Closed
Closed Open
Open Closed
Open Open
Open Closed
Open Open
Closed Closed
Closed Open
Closed Closed
Closed Open
Open Closed
Open Open
Configuration Mode
Jumper JP9
UG454_10_050908
UG454 (v1.1) January 30, 2009
R