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Remap in FMC

Question asked by Christophe Chaloin on Oct 4, 2017
Latest reply on Oct 5, 2017 by Christophe Chaloin

Reading the reference manual of STM32F4xx (RM0090), I need some explanation about the physical remap in FMC.

Page 71-72, §2.4, the interpretation of table 4 is not clear. Should I understand that when in mode Remap in FMC:


if MEM_MODE=010b (SYSCFG §9.3.1 page 298) :

NOR/PSRAM bank1 (64MB) goes from 0x0000 0000 to 0x03FF FFFF


NOR/PSRAM bank2 (64MB) goes from 0x0400 0000 to 0x07FF FFFF


and if MEM_MODE=100b (SYSCFG §9.3.1 page 298) :

the lower 128MB (out of 256MB) of SDRAM 1 are mapped from 0x0000 0000 to 0x07FF FFFF

(and the upper 128MB of SDRAM 1 are not accessible)


Because what I read in Table 4 doesn't look logical / correct. How does it exactly work ?


Thank you !