5
XP68-01-LX16 v1.0
2.3.
Power Supply
This board operates from single DC 3.3 V power supply from 35pin and 36pin.
Internally required 1.2[V] are generated by an on-board voltage regulator.
The external power supply should be sufficient and stabilized. Please do not apply
over 3.3V voltage.
Please input arbitrary voltage to VIOA (45, 62pin) and VIOB (11, 28pin). These
pins need to be supplied some voltage.
For more details, please refer to circuit schematics and data sheets of FPGA.
2.4.
Clock
50 MHz (U4) oscillator is equipped as on-board clock. External clock can be input
from IOA (0, 1pin) and IOB (0, 1pin).
For more details, please refer to circuit schematic.
2.5.
Configuration Switch (SW1)
The specification of configuration switch is below. “ON” means “Low (Ground)”.
For each pins details, please refer to Spartan-6 configuration user guide.
SW1
1
2
Net Label
M1
ASW0
Default
OFF
OFF
Function
Configuration Mode
User
Configuration Mode
M1
M0
Master Serial/SPI
Low (ON)
High (fixed)
JTAG
High (OFF)
High (fixed)
* M0 is fixed to High.
