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Altera_Forum's avatar
Altera_Forum
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14 years ago

JTAG UART Data Rate

Hi,

I'd like to know which is the data rate of JTAG UART???

Regards

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    JTAG bit rate is 6 MHz with USB Blaster, effective JTAG UART data rate will depend on the transmitted block size due to the JTAG and VJTAG overhead.

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    What do you mean as "trasmitted block size"??? do you refer to data packet size??? if it is so...I think..I'm gonna use 8bit data packet.....

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    The JTAG UART data rate depends on how you put data through it. On standard USB-Blaster it can get up to about 1Mbit/s if you send enough data to keep it busy.

    You have to have code on the target which services it quickly enough though especially on host->target transfer. If the target can't keep up then the host slows to a crawl because of the number of retransmits it has to do.
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Please use the general Nios II forum for questions like these. This is the C-to-Hardware accelerator section. Moving this and the other threads that don't belong here over.