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【应用手册】Combining Multiple Configuration Schemes
This application note describes how to configure Altera® FPGAs using multiple
configuration schemes on the same board.
Combining JTAG configuration with passive serial (PS) or active serial (AS)
configuration on your board is useful in the prototyping environment because it
allows multiple methods to configure your FPGA. For example, if your production
environment calls for PS configuration using a configuration device, you must
reprogram your configuration device every time you wanted to test a design change
in your FPGA. If you include the FPGA in the same JTAG chain as the configuration
device, the FPGA can be reconfigured using JTAG without having to reprogram the
configuration device.
an656.pdf