# Tag Info

Here's a good clue: - And, if you look at the value for $t_4$ it is quoted here: - So, a new data bit is available between 0 and 40 ns of the falling edge of SCLK. This means you can't rely on the falling edge of SCLK to read valid data. Of course, if you look at $t_7$ it tells you that current data is valid for maybe 7 ns should you attempt to read it ...