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Chapter 2: Board Components
2–25
Clocking Circuitry
Altera Corporation
Stratix III 3SL150 Development Board
lists PGM Config Select rotary switch component reference and
manufacturing information.
Clocking Circuitry
This section describes the Stratix III FPGA clocking inputs and outputs. The clocking
block comprises the following items:
■
High-speed clock oscillators:
■
50-MHz, FPGA PLL input
■
125-MHz FPGA PLL input
■
125-MHz MAX II CPLD input
■
24-MHz MAX II CPLD input
■
Reference clocks:
■
6-MHz USB PHY reference clock (FTDI device)
■
24-MHz USB PHY reference clock (Cypress device)
■
25-MHz Ethernet PHY reference clock
■
SMA connectors for clocking input and output signals
Table 2–18. PGM Config Select Rotary Switch Component Reference and Manufacturing Information
Board Reference
Description
Manufacturer
Manufacturing
Part Number
Manufacturer
Website
SW3
Rotary switch
Grayhill Corporation
94HCB16WT
www.grayhill.com