I am interfacing LPC1768 SPI bus and SST25VF016B SPI Serial Flash. Flash is 50Mhz, and these are the values I copied from SPI Flash Datasheet. page 24.
FCLK (Serial Clock Frequency) 50 MHz
TSCKH (Serial Clock High Time) 9 ns
TSCKL (Serial Clock Low Time) 9 ns
TSCKR (Serial Clock Rise Time (Slew Rate)) 0.1 V/ns
TSCKF (Serial Clock Fall Time (Slew Rate)) 0.1 V/ns
There is also figure 26 on page 28 in the same data sheet, shows AC Test input rise/fall times are less than 5ns.
Why Clock Slew rate is so low(0.1 V/ns)? Doesn't it make clock rise and fall times very long?