I'm using an LPC11E67JBD48, and can't find a specification for the flash access speed in either the datasheet or the user manual. After POR, the FLASHCFG->FLASHTIM register reads back as 0xC002, which does not match the user manual's register description.
The manual says that the lower two bits correspond to:
0x0 1 system clock flash access time.
0x1 2 system clocks flash access time. (default - according to the manual)
0x2 Reserved. (what my chip is actually reporting)
I've tried lowering the FLASHTIM register from 2 to 0, and this definitely results in a speed boost at 16 MHz, so the default value is more than 1 clock cycle.
So my question is, what is the maximum clock speed that I can use at each setting of FLASHTIM? I want to run the flash as fast as possible on my 16 MHz clock, without the risk of flash corruption at temperature / voltage extremes. Usually this information is available in the datasheet.