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PLTW S7 Reference Manual
Revised July 11, 2018
This manual applies to the PLTW S7 rev. A
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Overview
The PLTW S7 is a small, 48-pin DIP form factor board built around a Xilinx Spartan-7 FPGA. 32 FPGA digital I/O
signals, 2 FPGA analog input signals, an external power input rail, and a ground are routed to 100-mil-spaced
through-hole pins, making the PLTW S7 well-suited for use with solderless breadboards. At just 0.7” by 3.05”
inches, it can be loaded in a standard socket and used in embedded systems. The board includes a programming
ROM, clock source, USB programming and data transfer circuit, power supplies, LEDs, and buttons.
• Xilinx Spartan-7 FPGA (XC7S25-1CSGA225C)
o 3,650 slices containing four 6-input
LUTs and 8 flip-flops
o 1,620 Kbits of fast block RAM
o 3 clock management tiles, each with
a phase-locked loop and mixed-
mode clock manager
o 80 DSP slices
o Internal clock speeds exceeding
450 MHz
o On-chip analog-to-digital converter
(XADC)
o Programmable over JTAG and Quad-
SPI Flash
• Memory
o 4 MB Quad-SPI Flash
• Power
o Powered from USB or 5V external
supply connected to DIP pin 24
• USB
o USB-JTAG programming circuitry
o USB-UART bridge
• Push-buttons and LEDs
o 2 Buttons
o 4 LEDs
o 1 RGB LED
• Expansion Connectors
o 1 Pmod connector
▪ 8 total FPGA I/O
o 48-pin DIP form-factor headers
▪ 32 total FPGA I/O
▪ 2 single-ended 0-3.3V
analog inputs to XADC
▪ 2 power pins
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