Image select push button, Clock circuitry, On-board oscillators – Altera Arria V GT FPGA Development Board User Manual

Page 32: Image select push button –22, Clock circuitry –22, On-board oscillators –22

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Chapter 2: Board Components

Clock Circuitry

Arria V GT FPGA Development Board

December 2014

Altera Corporation

Reference Manual

Image Select Push Button

The program select push button, PGM1_SEL (S2), is an input to the MAX II CPLD
System Controller. The push button toggles the PGM1_LED[2:0]sequence that selects
which location in the flash memory is used to configure the FPGA. Refer to

Table 2–6

for the PGM1_LED[2:0] sequence definitions.

Clock Circuitry

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

On-Board Oscillators

The development board includes fixed and programmable oscillators with a
frequency of 50-MHz, 100-MHz, 125-MHz, 148.5-MHz, 156.25-MHz, and 625-MHz.