Flexible static memory controller (FSMC) RM0090
1548/1731 DocID018909 Rev 11
Note: The FSMC_BWTRx register is valid only if extended mode is set (mode B), otherwise all its
content is don’t care.
Mode C - NOR Flash - OE toggling
Figure 441. Mode C read accesses
Table 228. FSMC_BWTRx bit fields
Bit
number
Bit name Value to set
31:30 Reserved 0x0
29-28 ACCMOD 0x1
27-24 DATLAT Don’t care
23-20 CLKDIV Don’t care
19-16 BUSTURN Time between NEx high to NEx low (BUSTURN HCLK)
15-8 DATAST
Duration of the second access phase (DATAST+1 HCLK cycles for
write accesses,
7-4 ADDHLD Don’t care
3-0 ADDSET[3:0]
Duration of the first access phase (ADDSET HCLK cycles) for write
accesses.
Minimum value for ADDSET is 0.
A[25:0]
NOE
ADDSET DATAST
Memory transaction
NEx
D[15:0]
HCLK cycles HCLK cycles
NWE
NADV
data driven
by memory
ai15564
High