Datasheet

Figure 1.2. Arty S7 Battery Pack Connection.
Voltage regulator circuits from Analog Devices and Texas Instruments create the required 3.3V,
1.8V, 1.35V, 1.25V, and 1.00V supplies from the 5V power source. In the event that an external
supply or battery pack is used, the on-board Analog Devices 5V regulator provides the 5V source.
Table 1.1 provides additional information (typical currents depend strongly on FPGA configuration
and the values provided are typical of medium size/speed designs).
Supply
Circuits
Device
Current
(max/typical)
5V
Onboard Regulators, RGB LEDs
IC13: Analog Devices
ADP2384
3.5A/0.375A to 2A
3.3V
FPGA I/O, Clocks, Flash, PMODs, LEDs,
Buttons, Switches, USB port
IC12: Analog Devices
ADP5052
2.2A/NA
1.00V
FPGA Core and Block RAM
IC12: Analog Devices
ADP5052
1.0A/0.2A to 0.8A
1.8V
FPGA Auxiliary
IC12: Analog Devices
ADP5052
1.0A/NA
1.35V
DDR3L and associated FPGA bank
IC12: Analog Devices
ADP5052
1.0A/NA
1.25V
XADC Analog Reference
IC14: Texas Instruments
REF3012
25mA/NA
Table 1.1. Arty S7 Power Rails.
1.1 Current Monitoring
The 1.0V and 1.8V rails each have a 0.010 Ohm current sense resistor for monitoring the amount
of current being consumed by them. You can access them via JP3 for the 1.0V rail and JP4 for the
1.8V rail. To calculate the current on each power rail, use Ohm's law with R=0.010 and V equal to
the measured voltage across the jumper. To measure the voltage you can use an external digital
multimeter or oscilloscope.
2 FPGA Configuration
After power-on, the Spartan-7 FPGA must be configured (or programmed) before it can perform
any functions. You can configure the FPGA in one of two ways:
1. A PC can use the Digilent USB-JTAG circuitry (port J10) to program the FPGA any time
the power is on.
2. A file stored in the nonvolatile serial (SPI) flash device can be transferred to the FPGA
using the SPI port.