STMicroelectronics STM32F405

DocID018909 Rev 11 1601/1731
RM0090 Flexible memory controller (FMC)
1669
NOR Flash memory, non-multiplexed I/Os
The maximum capacity is 512 Mbits (26 address lines).
NOR Flash memory, 16-bit multiplexed I/Os
The maximum capacity is 512 Mbits.
PSRAM/SRAM, non-multiplexed I/Os
Table 259. Non-multiplexed I/O NOR Flash memory
FMC signal name I/O Function
CLK O Clock (for synchronous access)
A[25:0] O Address bus
D[31:0] I/O Bidirectional data bus
NE[x] O Chip Select, x = 1..4
NOE O Output enable
NWE O Write enable
NL(=NADV) O
Latch enable (this signal is called address
valid, NADV, by some NOR Flash devices)
NWAIT I NOR Flash wait input signal to the FMC
Table 260. 16-bit multiplexed I/O NOR Flash memory
FMC signal name I/O Function
CLK O Clock (for synchronous access)
A[25:16] O Address bus
AD[15:0] I/O
16-bit multiplexed, bidirectional address/data bus (the 16-bit address
A[15:0] and data D[15:0] are multiplexed on the databus)
NE[x] O Chip Select, x = 1..4
NOE O Output enable
NWE O Write enable
NL(=NADV) O
Latch enable (this signal is called address valid, NADV, by some NOR
Flash devices)
NWAIT I NOR Flash wait input signal to the FMC
Table 261. Non-multiplexed I/Os PSRAM/SRAM
FMC signal name I/O Function
CLK O Clock (only for PSRAM synchronous access)
A[25:0] O Address bus
D[31:0] I/O Data bidirectional bus