FSC NOR Flash AccessTime

[UlfPGerlach]

I have an issue with the access time of the 70ns NOR flash

if I calculate the the access time with the two relevant times (AdressSetupTime + DataSetupTime) * HCLK
(4+7)*5.95ns = 65.4ns (@168mhz).

The result is less than the needed 70ns.
The used M29W128Gx might function, but this is not 100% assured.

/* excerpt from stm324x9i_eval_nor.c */

/* NOR device configuration */
Timing.AddressSetupTime = 4;
Timing.AddressHoldTime = 3;
Timing.DataSetupTime = 7;
Timing.BusTurnAroundDuration = 1;
Timing.CLKDivision = 2;
Timing.DataLatency = 2;
Timing.AccessMode = FMC_ACCESS_MODE_A;

[ALABSTM]

Hi @UlfPGerlach,

Thank you for this report. We will get back to you as soon as we analyze it further. This may take some time. Thank you for your comprehension.

With regards,

[TOUNSTM]

ST Internal Reference: 185672