sp3e1600e_picoblaze_spi_flash_dte_115200_prog.ucf

利用Picoblaze实现对SPI flash的控制

# Constraints for 'spi_flash_memory_uart_programmer'.
#
# Revision B of the Spartan-3E Starter Kit.
#
# Ken Chapman - Xilinx Ltd - November 2005
#
# Time specifications for 50MHz clock
#
TIMESPEC TS01 = FROM : FFS : TO : FFS : 20 ns;
TIMESPEC TS02 = FROM : RAMS : TO : FFS : 20 ns;
TIMESPEC TS03 = FROM : FFS : TO : RAMS : 20 ns;
TIMESPEC TS04 = FROM : RAMS : TO : RAMS : 20 ns;
TIMESPEC TS05 = FROM : FFS : TO : PADS : 20 ns; 
TIMESPEC TS06 = FROM : PADS : TO : FFS : 20 ns; 
TIMESPEC TS07 = FROM : PADS : TO : RAMS : 20 ns; 
#TIMESPEC TS08 = FROM : RAMS : TO : PADS : 20 ns;
#
#
# I/O constraints for Spartan-3E Starter Kit (Rev.B)
#
# soldered 50MHz Clock
# 
NET "clk" LOC = "C9";
#
#
# UART connections for a DTE connection
#
 NET "RS232_TXD" LOC = "M13"; # DTE TX
 NET "RS232_RXD" LOC = "U8";  # DTE RX
#
# UART connections for a DCE connection
#
# NET "RS232_TXD" LOC = "M14"; # DCE TX
# NET "RS232_RXD" LOC = "R7";  # DCE RX
#
# SPI devices 
#
NET "spi_sck" LOC = "U16";
NET "spi_sdi" LOC = "T4";
NET "spi_sdo" LOC = "N10";
NET "spi_rom_cs" LOC = "U3";
NET "spi_amp_cs" LOC = "N7";
NET "spi_adc_conv" LOC = "P11";
NET "spi_dac_cs" LOC = "N8";
NET "spi_amp_shdn" LOC = "P7";
NET "spi_amp_sdo" LOC = "E18";
NET "spi_dac_clr" LOC = "P8";
#
# Strata Flash 
#
NET "strataflash_oe" LOC = "C18";
NET "strataflash_ce" LOC = "D16";
NET "strataflash_we" LOC = "D17";
#
NET "platformflash_oe" LOC = "T3";
#
# End of File
#