https://reference.digilentinc.com/reference/programmable-logic/nexys-a7/reference-manual 6/30
13 Five pushbuttons 28 Xilinx Artix-7 FPGA
14 Pmod port(s) 29 DDR2 memory
15 Temperature sensor
The Nexys A7 can be purchased with either a XC7A100T or XC7A50T FPGA loaded. These two Nexys A7 product variants are referred to
as the Nexys A7-100T and Nexys A7-50T, respectively. When Digilent documentation describes functionality that is common to both of
these variants, they are referred to collectively as the “Nexys A7”. When describing something that is only common to a specific variant, the
variant will be explicitly called out by its name.
The only difference between the Nexys A7-100T and Nexys A7-50T is the size of the Artix-7 part. The Artix-7 FPGAs both have the same
capabilities, but the XC7100T has about a 2 times larger internal FPGA than the XC750T. The differences between the two variants are
summarized below:
Product Variant Nexys A7-100T Nexys A7-50T
FPGA Part Number XC7A100T-1CSG324C XC7A50T-1CSG324I
Look-up Tables (LUTs) 63,400 32,600
Flip-Flops 126,800 65,200
Block RAM () 1,188 Kb 600 Kb
DSP Slices 240 120
Clock Management Tiles 6 5
The Nexys A7 is a rebrand of the Nexys 4 DDR board, which is an incremental update to the Nexys 4 board.
The only difference between the Nexys A7 and Nexys 4 DDR is the addition of the Nexys A7-50T variant of the Nexys A7, which has a
smaller gate array. The Nexys A7-100T variant is functionally identical to the Nexys 4 DDR.
Users of the Nexys A7 may find resources produced for the Nexys 4 DDR helpful, which can be found at the Nexys 4 DDR's Resource
Center (https://reference.digilentinc.com/reference/programmable-logic/nexys-a7/start).
The major improvement from the Nexys 4 to the Nexys 4 DDR is the replacement of the 16 MiB Cellular RAM () with a 128 MiB DDR2
SDRAM memory. Furthermore, to accommodate the new memory, the pin-out of the FPGA banks changed as well.
The audio output (AUD_PWM) needs to be driven open-drain as opposed to push-pull on the Nexys 4.
The Nexys A7 board can receive power from the Digilent USB-JTAG port (J6) or from an external power supply. Jumper JP3 (near the
power jack) determines which source is used.
Purchasing Options
Board Revisions
Migrating from Nexys 4 DDR
Migrating from Nexys 4
Functional Description
1 Power Supplies
To Next Page
Loading...