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programming software is not supported. But with the help of some tiny FPGA design which
only has to bypass SPI signals to external IO pins on connectors J3 or J4 it is possible to
access all needed SPI-Flash pins. Connect JTAG adapter to external IO pins as described
in the following chart.
SPI-Flash Direct Programming – necessary connections to JTAG cable
M25P16 FPGA Connection JTAG Signal Name
D MOSI TDI
Q DIN TDO
S CSO_B TMS
C CCLK TCK
VCC VCCO_IO VREF
GND GND GND
Make sure that VCCO_IO is configured for 3.3V signaling levels. Do not forget to also
enable FPGA power-up. With XILINX
TM
parallel cable IV the led lights green if FPGA is
powered on. Before starting to download a design to SPI-Flash with iMPACT programming
software it is necessary to prepare the required *.mcs SPI-PROM file. With xapp951
XILINX
TM
provides an application note how to accomplish that using iMPACT or PROMGen
software tools. Select 16M SPI PROM Density when asked. Now programming of the SPI-
Flash can be started by clicking Direct SPI Configuration from within iMPACT. Follow the
manual provided by XILINX
TM
in xapp951. Select M25P16 SPI-Flash PROM Type when
asked.
USBS6 / C1030-5510 http://www.cesys.com/
User Doc V0.3 -61- preliminary