User manual

Configuring the FPGA
• JTAG programming
• AS programming
67
In this method of programming, named after the IEEE standards Joint Test
Action Group, the configuration bit stream is downloaded directly into the
Cyclone IV E FPGA. The FPGA will retain this configuration as long as
power is applied to the board; the configuration information will be lost
when the power is turned off.
In this method, called Active Serial programming, the configuration bit
stream is downloaded into the Altera EPCS64 serial configuration device. It
provides non-volatile storage of the bit stream, so that the information is
retained even when the power supply to the DE2-115 board is turned off.
When the board's power is turned on, the configuration data in the EPCS64
device is automatically loaded into the Cyclone IV E FPGA.