STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

Flexible static memory controller (FSMC)
RM0008
19.6.2 NAND Flash / PC Card supported memories and transactions
Table 117 below shows the supported devices, access modes and transactions.
Transactions not allowed (or not supported) by the NAND Flash / PC Card controller appear
in gray.
Table 117.
Supported memories and transactions
Device Mode R/W
AHB
data size
Memory
data size
Allowed/
not allowed
Comments
Asynchronous R 8 8 Y
Asynchronous W 8 8 Y
NAND 8-bit
Asynchronous R 16 8 Y Split into 2 FSMC accesses
Asynchronous W 16 8 Y Split into 2 FSMC accesses
Asynchronous R 32 8 Y Split into 4 FSMC accesses
Asynchronous W 32 8 Y Split into 4 FSMC accesses
Asynchronous R 8 16 Y
Asynchronous W 8 16 N
NAND 16-bit
Asynchronous R 16 16 Y
Asynchronous W 16 16 Y
Asynchronous R 32 16 Y Split into 2 FSMC accesses
Asynchronous W 32 16 Y Split into 2 FSMC accesses
19.6.3 Timing diagrams for NAND, ATA and PC Card
Each PC Card/CompactFlash and NAND Flash memory bank is managed through a set of
registers:
● Control register: FSMC_PCRx
● Interrupt status register: FSMC_SRx
● ECC register: FSMC_ECCRx
● Timing register for Common memory space: FSMC_PMEMx
● Timing register for Attribute memory space: FSMC_PATTx
● Timing register for I/O space: FSMC_PIOx
Each timing configuration register contains three parameters used to define number of
HCLK cycles for the three phases of any PC Card/CompactFlash or NAND Flash access,
plus one parameter that defines the timing for starting driving the databus in the case of a
write. Figure 175 shows the timing parameter definitions for common memory accesses,
knowing that Attribute and I/O (only for PC Card) memory space access timings are similar.
444/995 Doc ID 13902 Rev 9