Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

need help with wake up time of cyclone II

Hello,

i need help in calculation of wake up time of EP2C8.

what is the minimum time in assuming i will use in 100 Mhz or 50 Mhz oscillator?

Thanks.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    I assume by "wake up time" you think of the time between power applied to the FPGA and the FPGA being in user I/O mode, do you?

    This configuration time is described in the Cyclone II Handbook, Chapter 13; timing being dependent on the internal oscillator (with its tolerances) only (thus the 50 or 100MHz oscillator does not change anything). The configuration time also depends on the mode (AS, PS, AS(Fast) or JTAG).

    (See page 18 for calculation of configuration time using AS,...)

    HTH,

    Carlhermann