Altera Cyclone III LS FPGA Development Board Manuale Utente Scaricare il pdf (Pagina 28)

2–20 Chapter 2: Board Components

Clock Circuitry

Cyclone III LS FPGA Development Board Reference Manual © October 2009 Altera Corporation

Table 2–18 lists the LCD/HSMC port B data select header switch component reference

and manufacturing information.

Configuration Push-button Switches

The PGM configure push-button switch, PGM_CONFIG (S8), is an input to the MAX

CPLD EPM2210 System Controller. The push-button switch forces a reconfiguration

of the FPGA from flash memory. The location in the flash memory is based on the

PGM_LED[2:0] setting when the button is released. Valid settings include

PGM_LED0, PGM_LED1, or PGM_LED2 illuminated. There are three pages in flash

memory reserved for FPGA designs.

The PGM select push-button switch, PGM_SEL (S9), toggles the program LEDs (D29,

D30, D31) sequence. Refer to

Table 2–8 on page 2–16 for the PGM_LED[2:0] sequence

definitions.

The CPU reset push-button switch, CPU_RESETn (S2) is a dedicated reset switch for

the embedded processors which is wired to the FPGA DEV_CLRn pin, while the MAX

II reset push-button switch, MAX_RESETn (S10), resets the MAX II CPLD EPM2210

System Controller.

Table 2–19 lists the configuration push-button switches component reference and

manufacturing information.

Clock Circuitry

This section describes the board's clock inputs and outputs.

Cyclone III LS FPGA Clock Inputs

Figure 2–6 shows the Cyclone III LS FPGA development board clock inputs.

Table 2–18. LCD/HSMB Data Select Header Switch Component Reference and Manufacturing Information

Board Reference Description Manufacturer

Manufacturer

Part Number Manufacturer Website

J18 2x1 100 mil jumper 3M/ESD 929665-09-36-I www.3m.com

Table 2–19. Configuration Push-button Switches Component Reference and Manufacturing Information

Board Reference Description Manufacturer

Manufacturer

Part Number Manufacturer Website

S2, S8, S9, S10 Push-button switch Panasonic EVQPAC07K www.panasonic.com/industrial/

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Altera Cyclone III LS FPGA Development Board Manuale Utente Pagina 28