4 Designing a Slice Card
I N T H I S C H A P T E R
·
Power
·
Signal I/O
·
sliceCARD Form Factors
·
Connector Pinouts
4.1
Power
sliceCARDs have two power supplies available to them, 5V and 3V3.
The 5V supply can range from 4.75V to 5.25V (5%) at a current of up to 0.25A per
slice.
The 3V3 supply can range from 3.13V to 3.47V (5%) at a current of up to 0.25A
per slice.
4.2
Signal I/O
A single sliceCARD connector has 36 contacts. The four types of slice have a
number of common pins which are described below.
·
GND. Power supply ground.
·
5V. 5V power supply input.
·
3V3. 3.3V power supply input.
·
NC. Not connected.
·
CLK. System clock input. 25MHz.
·
RST_N. System reset input, active low. Push-Pull drive.
The other available pins are connected to xCORE Processor I/Os as shown in the
pinout tables.
sliceCARDs can take their power from either 5V or 3V3 or both. sliceCARDs should
draw no more than 250mA from each supply.
At system power-on, the 5V supply will power up first, followed by the 3V3 supply.
The system reset signal will de-assert a short time after this.
XM005221A
