Cyclone III Active Serial Configuration

[Altera_Forum]

Does anyone know how long it will take to configure a EP3C10 with a EPCS1 using the active serial (AS) configuration? I need the FPGA to be live around 300 ms after power-up, and wanted to know if this is feasible. 

 Thanks for any response.

[Altera_Forum]

I know one of my EP3C25 designs takes approximatly 150 ms after power-up for configuration in active serial mode. (Fast Active Serial Mode I believe).. 

 Pete

[Altera_Forum]

Have a look at this document (http://www.altera.com/literature/hb/cyc3/cyc3_ciii51016.pdf). 

You need to take into account the POR time (you'll probably have to use a fast POR, but then, be sure that your power supplies will reach the correct level in time), then you have the configuration itself (page 9-20 gives you a method to estimate the maximum configuration time) and finally the initialization (pages 9-9/9-10) before the FPGA goes into user mode.

[Altera_Forum]

--- Quote Start ---   You need to take into account the POR time (you'll probably have to use a fast POR, but then, be sure that your power supplies will reach the correct level in time), then you have the configuration itself (page 9-20 gives you a method to estimate the maximum configuration time) and finally the initialization (pages 9-9/9-10) before the FPGA goes into user mode.  --- Quote End ---     Why would you be concerned that the power supplies are at the correct levels? Won't the FPGA start the POR time (3ms-9ms for Fast POR) once the power supplies have reached their correct levels?

[Altera_Forum]

The POR starts when the main power supplies (VccInt, VccA, and the VccIO for the banks that contain configuration pins) reach a certain level (I tried to find those levels, but I can't see them anywhere in the datasheet). Then you have the POR delay to ensure that those power supplies stabilize within the specified range (+/- 5% usually).