Altera MAX V CPLD - Clock Circuitry

Chapter 2: Board Components 2–7
Clock Circuitry
September 2015 Altera Corporation MAX V CPLD Development Board Reference Manual
Table 2–6 lists the board-specific LEDs component references and manufacturing
information.
Setup Elements
The development board does not have any setup elements.
1 To power-up the board, ensure that the
VAR_VCCIO jumper is set to 3.3 V before
plugging the USB cable into the USB Type-B connector (J4).
Clock Circuitry
The development board includes a single-ended clock input on a 4-pin through-hole
socket. To replace the clock input with a different frequency oscillator, unplug the
current oscillator from the board and plug the desired oscillator into the 4-pin socket.
Figure 2–4 shows the MAX V CPLD development board clock input.
The development board also includes a 6-MHz crystal oscillator which provides the
input clock for the USB 2.0 PHY device.
Table 2–16 lists the oscillator component reference and the manufacturing
information.
Table 2–6. Board-Specific LEDs Component References and Manufacturing Information
Board Reference Description Manufacturer Manufacturer Part Number Manufacturer Website
D1 Blue LED Lite-On LTST-C170TBKT www.liteon.com
D3 Green LEDs Lumex Inc. SML-LXT0805GW-TR www.lumex.com
Figure 2–4. MAX V CPLD Development Board Clock Input
5M570ZF256C5N
Single-Ended
Clock
10 MHz
Table 2–7. Oscillator Component Reference and Manufacturing Information
Board
Reference
Description Manufacturer
Manufacturer
Part Number
Manufacturer Website
J1
10-MHz oscillator, 3.3 V,
CMOS, 12.7 mm × 12.7 mm,
1/2-SZ, ±30 ppm.
Abracon Corporation ACHL-10.000MHZ-EK www.abracon.com
X1
6-MHz crystal oscillator, 20pF
SMD.
CTS Corporation ATS060SM-T www.ctscorp.com
Y1
24-MHz oscillator, 3.3 V,
CMOS SMD 3.2 mm × 2.5 mm,
±50 ppm.
Abracon Corporation ASE-24.000MHZ-ET www.abracon.com