FPGA programming modes

Programming Modes

The Xilinx Spartan-3A FPGA we will be using on the SiPM control board can be programmed using any of several modes. This table, adapted from the User Guide, Table 2-1, shows the available programming modes and how to select them by setting the M[2:0] pins on the FPGA.

For information about the other pins used in the programming process, see SiPM digital control board netlist.

M[2:0]	Programming Mode
<0:0:0>	Master serial (platform flash) mode
<0:0:1>	Master SPI mode
<0:1:0>	BPI up
<0:1:1>	Reserved
<1:0:0>	Reserved
<1:0:1>	JTAG mode
<1:1:0>	Slave parallel mode
<1:1:1>	Slave serial mode

SPI mode

When programmed in SPI mode, the variant select pin