Haider

Papilio DUO or Papilio Pro

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hi

 

i just trying to compare between papilio pro and duo to see what is the difference and which one have more feature to do more project and implement more circuit with it

 

 

 

from papilio pro page i see its contain

 

64Mbit Micron MT48LC4M16 SDRAM

 

 

while Duo does not have SDRAM only

 

2MB ISSI IS61WV5128 SRAM

 

 

can someone reccomend one of these boad to me

 

i want the logic analyzer and implement it on the board is that possible with papilio pro or not

 

 

 

my regards

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Hello Haider,

 

The SRAM of the Papilio DUO is much easier to use and is more suitable to use with the Logic Analyzer core. You get less of it but the tradeoff is how easy it is to use. With the SDRAM you get a lot more, but you have to learn about and follow the timing restrictions to utilize it.

 

Jack.

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thank you jack for reply

 

one more question

 

what if i want to implement or design hardware with Duo board need SDRAM like one in papilio pro

in this situation can i use external sdram or the SRAM will be enough

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Well, the constraint is how many pins are available... You could connect SDRAM to a CPLD and make a simplified memory interface that uses fewer pins and is tailored for your memory usage...

 

Jack.

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thank you Mr.Jack Gassett

 

i thin i'll choice Papilio Duo to start learing

i'll buy the kits

Papilio DUO-2MB

and

LogicStart Shield

 

from seeedstudio.com

 

but one more question please

when i implement logic analyzer i thing i need probe to use it

what is the best kit

is this will be enough and connect well with Duo or not

 

www.seeedstudio.com/depot/Open-logic-sniffer-probe-cable-p-619.html

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i didn't use logic analyzer before

also i dont have one its little expensive

i want to learn FPGA so i think it's good chance to use the same board to implement Logic Analyze...

i want to analyze USB signal between usb flash disk and PC or any thing have digital signal

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i use the probes from seeedstudio and they work fine, but you will probably need a male/male header to connect the probes to the pduo

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Hello Haider,

 

Those probes will work fine with the DUO but like Felix said, you will need a way to connect the probes to the DUO. This buffer would protect the FPGA pins from higher voltages and give you the male pins you need:

http://www.seeedstudio.com/depot/Logic-Sniffer-16bit-Input-Buffer-Wing-p-721.html

 

Jack.

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