Datasheet

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STM32F413xG/H Electrical characteristics
174
Synchronous waveforms and timings
Figure 57 through Figure 60 represent synchronous waveforms and Table 96 through
Table 99 provide the corresponding timings. The results shown in these tables are obtained
with the following FSMC configuration:
• BurstAccessMode = FSMC_BurstAccessMode_Enable;
• MemoryType = FSMC_MemoryType_CRAM;
• WriteBurst = FSMC_WriteBurst_Enable;
• CLKDivision = 1; (0 is not supported, see the STM32F446 reference manual: RM0390)
• DataLatency = 1 for NOR Flash; DataLatency = 0 for PSRAM
Table 94. Asynchronous multiplexed PSRAM/NOR write timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(NE)
FSMC_NE low time 4 * T
HCLK
- 1 4 * T
HCLK
+ 1
ns
t
v(NWE_NE)
FSMC_NEx low to FSMC_NWE low T
HCLK
- 1 T
HCLK
+ 0.5
t
w(NWE)
FSMC_NWE low time 2 * T
HCLK
- 0.5 2 * T
HCLK
- 0.5
t
h(NE_NWE)
FSMC_NWE high to FSMC_NE high hold time T
HCLK
- 0.5 -
t
v(A_NE)
FSMC_NEx low to FSMC_A valid - 0
t
v(NADV_NE)
FSMC_NEx low to FSMC_NADV low 0 0.5
t
w(NADV)
FSMC_NADV low time T
HCLK
T
HCLK
+ 1
t
h(AD_NADV)
FSMC_AD (address) valid hold time after FSMC_NADV
high)
T
HCLK
+ 0.5 -
t
h(A_NWE)
Address hold time after FSMC_NWE high T
HCLK
+ 0.5 -
t
h(BL_NWE)
FSMC_BL hold time after FSMC_NWE high T
HCLK
- 0.5 -
t
v(BL_NE)
FSMC_NEx low to FSMC_BL valid - 0.5
t
v(Data_NADV)
FSMC_NADV high to Data valid - T
HCLK
+ 2.5
t
h(Data_NWE)
Data hold time after FSMC_NWE high T
HCLK
-
1. C
L
= 30 pF.
2. Guaranteed by characterization results.
Table 95. Asynchronous multiplexed PSRAM/NOR write-NWAIT timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(NE)
FSMC_NE low time 9 * T
HCLK
- 1 9 * T
HCLK
+ 1
ns
t
w(NWE)
FSMC_NWE low time 7 * T
HCLK
- 0.5 7 * T
HCLK
+ 0.5
t
su(NWAIT_NE)
FSMC_NWAIT valid before FSMC_NEx high 6 * T
HCLK
+ 2 -
t
h(NE_NWAIT)
FSMC_NEx hold time after FSMC_NWAIT invalid 4 * T
HCLK
- 1 -
1. C
L
= 30 pF.
2. Guaranteed by characterization results.
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