Introduction to Indirect Programming – SPI or BPI Flash
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iMPACT
iMPACT can program certain BPI or SPI Flash devices indirectly, by preloading into the FPGA a design that understands the boundary-scan (JTAG) protocol and
converts the applied data to BPI or SPI bus relationships. This FPGA design serves as a bridge between the iMPACT programming tool and the Flash device
connected to the FPGA. The design is downloaded into the FPGA by iMPACT (using a Xilinx® cable) to make the indirect programming of the SPI or BPI Flash device
possible.
For a detailed description of indirect programming, see these Xilinx Application Notes:
Indirect Programming of SPI Serial Flash PROMs with Spartan®-3A FPGAs (
XAPP974)
Indirect Programming of BPI PROMs with Virtex®-5 FPGAs (XAPP973)
For SPI and BPI configuration information, see the FPGA Configuration User Guide pertaining to the FPGA that will be used for indirect programming. These User
Guides are available from the
Documentation Web page on the Xilinx website.
The indirect programming solution in iMPACT is used during prototype design stages and is supported by the Xilinx FPGAs that have a direct SPI or BPI flash
configuration mode. Refer to the table below for the supported Xilinx FPGAs and Flash memory devices.
Requirements for the indirect programming solution are:
The iMPACT software.
A supported Xilinx FPGA with a supported Flash device attached. This will be:
An FPGA attached to an SPI Flash memory through an SPI direct configuration interface
OR
An FPGA attached to a BPI Flash memory through a BPI direct configuration interface.
A Xilinx cable and connector.
iMPACT supports select SPI and BPI Flash memories. The Flash devices supported by iMPACT’s indirect programming are listed in the table below.
iMPACT SPI Flash Programming Support
Flash
Vendor
Flash Family Supported
Flash Density
SPI Direct
Programming
Support?
SPI Indirect
Programming
Support
Numonyx M25P 512Kb – 128Mb Yes Spartan-3E,
Spartan-3A,
Spartan-3A
DSP.
Spartan-6,
Virtex-5,
Virtex-6
M25PE 1Mb – 16Mb Yes Spartan-3E,
Spartan-3A,
Spartan-3A
DSP,
Spartan-6,
Virtex-5
M45PE 1Mb – 16Mb Yes Spartan-3E,
Spartan-3A,
Spartan-3A
DSP,
Spartan-6,
Virtex-5
Atmel AT45DB (Rev
B, C, and D)
1Mb – 64Mb Yes Spartan-3E,
Spartan-3A,
Spartan-3A
DSP,
Spartan-6,
Virtex-5
Winbond W25Q 16Mb – 64Mb Yes Spartan-6
iMPACT BPI Flash Programming Support
Flash Vendor Flash Family Supported
Flash Density
Data Bus Width BPI Indirect
Programming
Introduction to Indirect Programming – SPI or BPI Flash Memory http://www.xilinx.com/support/documentation/sw_manuals/xilinx11/pim_c_introductio...
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