Chapter 12: Spi Serial Flash - Xilinx Spartan-3A User Manual

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SPI Serial Flash
The Spartan-3A/3AN Starter Kit board includes two different styles of SPI serial Flash, as
shown in
configuration, however, the FPGA application has full access to both PROMs for data
storage or Flash update purposes.
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The SPI serial Flash is useful in a variety of applications. The SPI Flash provides a possible
means to configure the FPGA—a new feature in Spartan-3E and Spartan-3A/3AN FPGAs.
The SPI Flash is also available to the FPGA after configuration for a variety of purposes,
such as:
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Spartan-3A/3AN Starter Kit Board User Guide
UG334 (v1.0) May 28, 2007
Figure 12-1. Only one style is available to configure the FPGA. After
STMicroelectronics M25P16
Atmel AT45DB161D 16 Mbit SPI serial DataFlash PROM
Atmel AT45DB161D
Platform Flash
Jumper (J46)
FPGA Mode Select
Jumpers (J26)
Figure 12-1: SPI Serial Flash PROMs and Associated Jumpers
Simple non-volatile data storage
Storage for identifier codes, serial numbers, IP addresses, etc.
Storage of MicroBlaze processor code that can be shadowed into DDR SDRAM.
www.xilinx.com
16 Mbit SPI serial Flash PROM
STMicro M25P16
Chapter 12
SPI Flash Select
Jumpers (J1)
JTAG and SPI
Programming
Blocks (J23, J25)
UG334_c12_01_052407
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