Table 211. Nor/Psram Bank Selection; Figure 433. Fsmc Memory Banks; External Device Address Mapping - STMicroelectronics STM32F405 Reference Manual

RM0090
36.4

External device address mapping

From the FSMC point of view, the external memory is divided into 4 fixed-size banks of
256 Mbytes each (Refer to
•
Bank 1 used to address up to 4 NOR Flash or PSRAM memory devices. This bank is
split into 4 NOR/PSRAM subbanks with 4 dedicated Chip Selects, as follows:
–
–
–
–
•
Banks 2 and 3 used to address NAND Flash devices (1 device per bank)
•
Bank 4 used to address a PC Card device
For each bank the type of memory to be used is user-defined in the Configuration register.
36.4.1 NOR/PSRAM address mapping
HADDR[27:26] bits are used to select one of the four memory banks as shown in
00
01
Figure
Bank 1 - NOR/PSRAM 1
Bank 1 - NOR/PSRAM 2
Bank 1 - NOR/PSRAM 3
Bank 1 - NOR/PSRAM 4

Figure 433. FSMC memory banks

Address
6000 0000h
6FF F FFF Fh
7000 0000h
7FF F FFF Fh
8000 0000h
8FF F FFF Fh
9000 0000h
9FF F FFF Fh

Table 211. NOR/PSRAM bank selection

(1)
HADDR[27:26]
DocID018909 Rev 11
Flexible static memory controller (FSMC)
433):
Banks Supported memory type
Bank 1
4 × 64 MB
Bank 2
4 × 64 MB
NAND Flash
Bank 3
4 × 64 MB
Bank 4
4 × 64 MB
Bank 1 - NOR/PSRAM 1
Bank 1 - NOR/PSRAM 2
NOR / PSRAM
PC Card
ai14719
Selected bank
Table 211.
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