Altera Stratix III Development Board Instrukcja Użytkownika Pobierz pdf (Strona 27)

Chapter 2: Board Components 2–19

Configuration, Status, and Setup Elements

May 2013 Altera Corporation Stratix III 3SL150 Development Board

Reference Manual

FPGA Programming from Flash Memory

On power-up or after pressing the RESET_CONFIG or FACTORY_CONFIG

push-button switch, the MAX II CPLD device’s parallel flash loader (PFL)

megafunction configures the Stratix III FPGA from flash memory.

The PFL megafunction reads 16-bit data from the flash memory and converts it to

passive serial format. The data is written to the Stratix III device’s dedicated

DCLK

and

configuration pins at 12 MHz.

You can source the FPGA configuration from flash memory from one of eight images.

The image is selected by the PGM Config Select rotary switch, board reference SW3.

The rotary switch has 16 positions, but only the first eight are used. The positions

correspond to an offset in flash memory where the PFL is directed to for FPGA

configuration data.

1 Board reference SW1 position 4 (SW1.4), labeled

MAX_ENABLE

, must be in the 0 position

(off) to enable the configuring from flash memory feature.

Flash Programming over USB Interface

You can program the flash memory at any time the board is powered up using the

USB 2.0 interface and the Quartus II Programmer’s JTAG mode.

The development kit implements the Altera PFL megafunction for flash

programming. The PFL is a block of logic that is programmed into an Altera

programmable logic device (FPGA or CPLD). The PFL functions as a utility for

writing to a compatible flash device. The development kit ships with a pre-built PFL

design called stratixIII_3sl150_dev_pfl. The PFL design is programmed onto the

FPGA whenever the flash is to be written using the Quartus II software.

f For more information about:

■ The PFL megafunction, refer to AN 386: Using the Parallel Flash Loader with the

Quartus II Software.

■ Basic flash programming instructions for the development board, refer to

Appendix A: Programming the Flash Device in the Stratix III Development Kit User

Guide.

Status Elements

The development board includes general user, board specific, and HSMC

user-defined LEDs. This section discusses board-specific LEDs as well as the power

display device. For information about general and HSMC user-defined LEDS, refer to

“User-Defined LEDs” on page 2–30.

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Altera Stratix III Development Board Instrukcja Użytkownika Strona 27