Table 79. Supported Memories And Transactions; Nand Flash Supported Memories And Transactions - ST STM32L4x6 Reference Manual

Flexible static memory controller (FSMC)
14.6.2

NAND Flash supported memories and transactions

Table 79
allowed (or not supported) by the NAND Flash controller are shown in gray.
Device
NAND 8-bit
NAND 16-bit
14.6.3 Timing diagrams for NAND Flash memory
The NAND Flash memory bank is managed through a set of registers:
•
Control register: FMC_PCR
•
Interrupt status register: FMC_SR
•
ECC register: FMC_ECCR
•
Timing register for Common memory space: FMC_PMEM
•
Timing register for Attribute memory space: FMC_PATT
Each timing configuration register contains three parameters used to define number of
HCLK cycles for the three phases of any NAND Flash access, plus one parameter that
defines the timing for starting driving the data bus when a write access is performed.
Figure 49
that Attribute memory space access timings are similar.
388/1693
shows the supported devices, access modes and transactions. Transactions not

Table 79. Supported memories and transactions

Mode R/W
Asynchronous R
Asynchronous W
Asynchronous R
Asynchronous W
Asynchronous R
Asynchronous W
Asynchronous R
Asynchronous W
Asynchronous R
Asynchronous W
Asynchronous R
Asynchronous W
shows the timing parameter definitions for common memory accesses, knowing
DocID024597 Rev 3
AHB Memory
data size data size not allowed
8 8
8 8
16 8
16 8
32 8
32 8
8 16
8 16
16 16
16 16
32 16
32 16
Allowed/
Comments
Y
Y
Y Split into 2 FMC accesses
Y Split into 2 FMC accesses
Y Split into 4 FMC accesses
Y Split into 4 FMC accesses
Y
N
Y
Y
Y Split into 2 FMC accesses
Y Split into 2 FMC accesses
RM0351
-
-
-
-
-
-