Information

DocID15818 Rev 11 147/178
STM32F20xxx Electrical characteristics
177
Figure 72. NAND controller waveforms for common memory read access
Figure 73. NAND controller waveforms for common memory write access
Table 82. Switching characteristics for NAND Flash read cycles
(1)(2)
1. C
L
= 30 pF.
2. Based on characterization, not tested in production.
Symbol Parameter Min Max Unit
t
w(N0E)
FSMC_NOE low width 4T
HCLK
- 1 4T
HCLK
+ 2 ns
t
su(D-NOE)
FSMC_D[15-0] valid data before FSMC_NOE
high
9-ns
t
h(NOE-D
) FSMC_D[15-0] valid data after FSMC_NOE high 3 - ns
t
d(ALE-NOE)
FSMC_ALE valid before FSMC_NOE low - 3T
HCLK
ns
t
h(NOE-ALE)
FSMC_NWE high to FSMC_ALE invalid 3T
HCLK
+ 2 - ns
FSMC_NWE
FSMC_N
OE
FSMC_D[15:0]
t
w(NOE)
t
su(D-NOE)
t
h(NOE-D)
ai14912c
ALE (FSMC_A17)
CLE (FSMC_A16)
FSMC_NCEx
t
d(ALE-NOE)
t
h(NOE-ALE)
t
w(NWE)
t
h(NWE-D)
t
v(NWE-D)
ai14913c
FSMC_NWE
FSMC_N
OE
FSMC_D[15:0]
t
d(D-NWE)
ALE (FSMC_A17)
CLE (FSMC_A16)
FSMC_NCEx
t
d(ALE-NOE)
t
h(NOE-ALE)