Nexys3 FPGA with MicroBlaze

[nsgil85]

Hi all,

Im trying to get an idea if it is possible to implement a MicroBlaze processor on Nexys3 Board (Xilinx - XC6SLX16) with very light program that pass data to I2C controller(from Uart) without choking the FPGA resources.

In other words how can i estimate the amount of resources do i need for the MicroBlaze and it's program?

Thanks
Gil

 

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From the DS160 datasheet:

Device XC6SLX16
Logic cells 14,579
Slices 2,278
Flip-flops 18,224
max dist ram (Kb) 136
DSP48s 32
18Kb BRAMs 32
Max RAM (Kb) 576
CMTs 2
Memory controller blocks 2
PCI endpoints 0
Trancievers 0
Total I/O Banks 4
Max user I/O 232

From the microblaze documentation.
It looks like it takes <1000 LUTs and <1000 Flip-flops to implement a simple MCS system. As there are 4 LUTs per slice and 8 FFs per slice the MCS will take <11% of the device...

Pretty easy to do estimations if you read the documentation. Besides Avnet sells a LX9 microboard USB stick that is for embedded development using microblaze.

 

[nsgil85]

Hi ads-ee

Thank you for your reply,
I read the Micro-blaze doc but still, how do know the resources statistics for the Microblaze Program (not the core IP) ?

Thanks
Gil

 

[ads-ee]

Ask a software engineer. i only work on hardware, so I'm not conversent with the lines of C to bytes of memory relationship. Regardles 5he LX16 has only 32 block RAMs, so a 32KB memory would use half the block RAM in the part.