Chapter 12: Spi Serial Flash - Xilinx spartan-3a User Manual

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SPI Serial Flash
Spartan-3A/3AN FPGA Starter Kit Board User
UG334 (v1.1) June 19, 2008
®
The Spartan -3A/3AN FPGA Starter Kit board includes two different styles of SPI serial
Flash, as shown in Figure
configuration, however, the FPGA application has full access to both PROMs for data
storage or Flash update purposes.
•
STMicroelectronics
•
Atmel AT45DB161D
Platform Flash
Jumper (J46)
FPGA Mode Select
Jumpers (J26)
Figure 12-1: SPI Serial Flash PROMs and Associated Jumpers
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:
•
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.
Guidewww.xilinx.com
12-1. Only one style is available to configure the FPGA. After
M25P16 16 Mbit SPI serial Flash PROM
16 Mbit SPI serial DataFlash PROM
Atmel AT45DB161D
Chapter 12
STMicro M25P16
SPI Flash Select
Jumpers (J1)
JTAG and SPI
Programming
Blocks (J23, J25)
UG334_c12_01_052407
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