Shield Digital I/O - Xilinx Arty A7 Reference Manual

22.8.2018
Pin Name Shield Function
SCL I2C Clock
SDA I2C Data
SCLK () SPI Clock
MOSI () SPI Data out
MISO () SPI Data in
SS SPI Slave Select
A0-A5 Single-Ended
Analog Input
A6-A11 Differential
Analog Input
V_P, V_N Dedicated
Differential
Analog Input
XGND XADC Analog
Ground
XVREF XADC Analog
Voltage Reference
Not Connected
N / C
IOREF Digital I/O
Voltage reference
RST Reset to Shield
3V3 3.3V Power Rail
5V0 5.0V Power Rail
GND (), G Ground
VIN Power Input

11.1 Shield Digital I/O

The pins connected directly to the FPGA can be used as general purpose inputs or outputs. These pins include the I2C, SPI, and general
purpose I/O pins. There are 200 Ohm series resistors between the FPGA and the digital I/O pins to help provide protection against
accidental short circuits. The absolute maximum and recommended operating voltages for these pins are outlined in the table below.
Absolute
Minimum Voltage
Powered -0.4 V
Unpowered -0.4 V
https://reference.digilentinc.com/reference/programmable-logic/arty-a7/reference-manual
Arty A7 Reference Manual [Reference.Digilentinc]
Arty A7 Connection
See Section titled "Shield Digital I/O"
See Section titled "Shield Digital I/O"
See Section titled "Shield Digital I/O"
See Section titled "Shield Digital I/O"
See Section titled "Shield Digital I/O"
See Section titled "Shield Digital I/O"
See Section titled "Shield Analog I/O"
See Section titled "Shield Analog I/O"
See Section titled "Shield Analog I/O"
Connected to net used to drive the XADC ground reference on the FPGA (VREFN)
Connected to 1.25 V, 25mA rail used to drive the XADC voltage reference on the FPGA
(VREFP)
Not Connected
Connected to the 3.3V Power Rail (See the "Power Supplies" section)
Connected to the red "RESET" button and a Digital I/O of the FPGA. When JP2 is
shorted, it is also connected to the DTR signal of the FTDI USB-UART bridge.
Connected to the 3.3V Power Rail (See the "Power Supplies" section)
Connected to the 5.0V Power Rail (See the "Power Supplies" section)
Connected to the ground plane
Connected in parallel with the external power supply connector (J13). See the "Power
Supplies" section for information on powering the Arty A7 from this pin.
Recommended Minimum
Operating Voltage
-0.2 V
N/A
Recommended Maximum
Operating Voltage
3.4 V
N/A
Absolute
Maximum Voltage
3.75 V
0.55 V
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