Altera Cyclone III LS FPGA Development Board - Manual (Page 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 II
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/