Electrical characteristics
STM32F405xx, STM32F407xx
Figure 71. NAND controller waveforms for common memory read access
FSMC_NCEx
ALE (FSMC_A17)
CLE (FSMC_A16)
td(ALE-NOE)
th(NOE-ALE)
FSMC_NWE
FSMC_NOE
tw(NOE)
tsu(D-NOE)
th(NOE-D)
FSMC_D[15:0]
ai14912c
Figure 72. NAND controller waveforms for common memory write access
FSMC_NCEx
ALE (FSMC_A17)
CLE (FSMC_A16)
td(ALE-NOE)
tw(NWE)
th(NOE-ALE)
FSMC_NWE
FSMC_NOE
td(D-NWE)
tv(NWE-D)
th(NWE-D)
FSMC_D[15:0]
ai14913c
(1)
Table 85. Switching characteristics for NAND Flash read cycles
Symbol
Parameter
Min
Max
Unit
4THCLK
0.5
–
tw(N0E)
FSMC_NOE low width
4THCLK+ 3
ns
tsu(D-NOE) FSMC_D[15-0] valid data before FSMC_NOE high
th(NOE-D) FSMC_D[15-0] valid data after FSMC_NOE high
10
0
-
ns
ns
ns
ns
-
td(ALE-NOE) FSMC_ALE valid before FSMC_NOE low
th(NOE-ALE) FSMC_NWE high to FSMC_ALE invalid
1. CL = 30 pF.
-
3THCLK
-
3THCLK– 2
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DocID022152 Rev 4
STMICROELECTRONICS [ ST ]
