To start with coolrunner CPLD Device

[prakashvenugopal]

Hi,

To start working with Coolrunner CPLD device. Can any one please send the basic documentation for CPLD and how to interface the Peripherals from CPLD?

Please help me.

Regards,
V. Prakash

 

[bigdogguru]

To start working with Coolrunner CPLD device. Can any one please send the basic documentation for CPLD and how to interface the Peripherals from CPLD?

What is the exact model of the CPLD that you are using? Is this a development board or a board of your design?

BigDog

 

[prakashvenugopal]

Hi,

I am planning to design coolrunner II (XC2C256) (TQ144 package). I heard that Nowadays xilinx CPLD Development boards get absolete. But there is a support on chip level. so i am trying to design my own board. I need help from you people.

thanks,
V. Prakash

 

[bigdogguru]

I have often found it quite convenient to use the designs, insights and schematics of known high quality development boards as reference designs when developing my own board for a new device. Why reinvent the wheel?



CPLD-design

CPLD Design Kit

Some helpful literature concerning the Coolrunner II CPLD:



Programmable Logic Design Quick Start Guide

XC2C256 CoolRunner-II CPLD Datasheet

The info should get you started in the right direction,

BigDog

 

[prakashvenugopal]

Hi,

Thanks. Did Xilinx still selling the CPLD Development boards? Please let me know so that i will go for Development board itself.

Regards,
V. Prakash

 

[bigdogguru]

Unfortunately, Digilent not longer manufactures or sell the XC2XL board. Xilinx still offer them to various distributors:

CoolRunner-II CPLD Starter Kit

**broken link removed**

However I see them regularly up for bid on eBay and they rarely sell for more than $25 used.

Here's a new in the box kit:

**broken link removed**

Here's various Coolrunner dev boards:

Coolrunner2 Development Boards

BigDog

 

[prakashvenugopal]

Hi,

Did know the clock oscillator part number used in this attached reference schematic. Please let me know. refer page 1 of this attachment.

thanks,
V. Prakash

 

[bigdogguru]

Both my boards have a simple Half Can Oscillator 3.3V with a frequency of 1.8432MHz.

Similar to the 8-pin XO in following datasheet:



BigDog

 

[prakashvenugopal]

Hi,

The Frequency range mentioned in the datasheet is 1.0 – 105.561 MHz. I want the clock oscillator of 16 Mhz? How to fix the this frequency range in it? No external component seen to tune the frequency? Please let me know.


thanks,
V. Prakash

---------- Post added at 09:56 ---------- Previous post was at 09:55 ----------

Hi,

The Frequency range mentioned in the datasheet is 1.0 – 105.561 MHz. I want the clock oscillator of 16 Mhz? How to fix the this frequency range in it? No external component seen to tune the frequency? Please let me know.


thanks,
V. Prakash

 

[prakashvenugopal]

Hi,

Will this MXO45-3C-16M0000 for 16 Mhz?

Can i use Max 7381 for CPLD clock oscillator. Please find the attachment for the Max 7381.

 

[bigdogguru]

Will this MXO45-3C-16M0000 for 16 Mhz?

No, that particular device requires an operating voltage of 5V.

Here is an example of a XO with a 3.3V operating voltage:

OSCILLATOR 16.000MHZ 3.3V 1/2-SZ

Can i use Max 7381 for CPLD clock oscillator. Please find the attachment for the Max 7381.

Yes, the MAX7381 has an operating voltage range 2.7V to 5.5V, the 3.3V requirement is within that range.

BigDog

 

[prakashvenugopal]

Hi,

thanks. In the CPLD schematic, the decoupling capacitor of 0.047uf (ceramic) is used. can we go for decoupling capacitor of 0.1uf instead of this. please let me know.

thanks,
V. Prakash

and also please let me know the voltage range of this capacitor. can we use 0.1uf / 25V?

 

[prakashvenugopal]

Hi,

I had talked with xilinx PAE. We recommend to use 0.1uf /10V as decoupling capacitor for the CPLD Device. This for your information.