Datasheet

DocID027107 Rev 6 171/202
STM32F446xC/E Electrical characteristics
175
Figure 63. SDRAM write access waveforms
Table 102. SDRAM write timings
(1)(2)
1. C
L
= 10 pF on data and address line. C
L
=15 pF on FMC_SDCLK.
2. Guaranteed based on test during characterization.
Symbol Parameter Min Max Unit
F
(SDCLK)
Frequency of operation - 90 MHz
t
w(SDCLK)
FMC_SDCLK period 2T
HCLK
- 0.5 2T
HCLK
+ 0.5
ns
t
d(SDCLKL _Data)
Data output valid time - 2
t
h(SDCLKL _Data)
Data output hold time 0.5 -
t
d(SDCLK _Add)
Address valid time - 3
t
d(SDCLKL _SDNWE))
SDNWE valid time - 1.5
t
h(SDCLKL_SDNWE))
SDNWE hold time 0 -
t
d(SDCLKL_SDNE))
Chip select valid time - 1.5
t
h(SDCLKL_SDNE)
Chip select hold time 0 -
t
d(SDCLKL_SDNRAS)
SDNRAS valie time - 1
t
h(SDCLKL_SDNRAS)
SDNRAS hold time 0 -
t
d(SDCLKL_SDNCAS)
SDNCAS valid time - 1
t
h(SDCLKL_SDNCAS)
SDNCAS hold time 0 -
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