Parallel Flash Loader Megafunction User Guide (PDF) - Altera

Specifications Page 49
Use the following formulas in this calculation:
C access = T access *F clk +1
C flash for Normal Mode = C access / 2
C cfg = 2.5
C overhead = 3*C access
Total Clock Cycles = C overhead + max (C flash , C cfg )*N
Total Configuration Time = Total Clock Cycle/ PFL Input Clock
Substitute these values in the following formulas:
C access = (100ns * 100MHz) + 1 = 11
C flash = 11/2 = 5.5
C cfg = 2.5
C overhead = 3*11 = 33
Total Clock Cycles = 33 + 5.5 * 590848 = 3249697
Total Configuration Time at 100 MHz = 3249697/ 100 × 10 6 = 32.5ms
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Page mode configuration time calculation:
.rbf size for EP2S15 = 577 KB = 590,848 Bytes
Configuration mode = FPP without data compression or encryption
Flash access mode = Page Mode
Flash data bus width = 16 bits
Flash access time = 100 ns
PFL input Clock = 100 MHz
DCLK ratio = 2
Use the following formulas in this calculation:
T page_access = 30 ns
C access = [(T access *F clk +1) + (T page_access *F clk *15)]/16
C flash for Page Mode = C access / 2
C cfg = 2.5
C overhead = 3* C access
Total Clock Cycles = C overhead + max (C flash , C cfg )*N
Total Configuration Time = Total Clock Cycle/ PFL Input Clock
Substitute these values in the following formulas:
C access = [((100ns * 100 MHz) + 1) + (30ns*100 MHz*15)]/16 = 3.5
C flash for Page Mode = 3.5/ 2 = 1.75 = 2
C cfg = 2.5
C overhead = 3*3.5 = 10.5
Total Clock Cycles = 10.5 + 2.5*590848 = 1477130.5
Total Configuration Time at 100 MHz = 1477130.5 / 100 × 10 6 = 14.77 ms
Parallel Flash Loader Megafunction User Guide
May 2013
Altera Corporation