Datasheet

DocID027590 Rev 4 187/227
STM32F745xx STM32F746xx Electrical characteristics
195
Table 102. SDRAM read timings
(1)
1. Guaranteed by characterization results.
Symbol Parameter Min Max Unit
t
w(SDCLK)
FMC_SDCLK period 2T
HCLK
−0.5 2T
HCLK
+0.5
ns
t
su(SDCLKH _Data)
Data input setup time 3.5 -
t
h(SDCLKH_Data)
Data input hold time 1.5 -
t
d(SDCLKL_Add)
Address valid time - 4
t
d(SDCLKL- SDNE)
Chip select valid time - 0.5
t
h(SDCLKL_SDNE)
Chip select hold time 0 -
t
d(SDCLKL_SDNRAS)
SDNRAS valid time - 0.5
t
h(SDCLKL_SDNRAS)
SDNRAS hold time 0 -
t
d(SDCLKL_SDNCAS)
SDNCAS valid time - 0.5
t
h(SDCLKL_SDNCAS)
SDNCAS hold time 0 -
Table 103. LPSDR SDRAM read timings
(1)
1. Guaranteed by characterization results.
Symbol Parameter Min Max Unit
t
W(SDCLK)
FMC_SDCLK period 2T
HCLK
−0.5 2T
HCLK
+0.5
ns
t
su(SDCLKH_Data)
Data input setup time 3 -
t
h(SDCLKH_Data)
Data input hold time 1.5 -
t
d(SDCLKL_Add)
Address valid time - 3.5
t
d(SDCLKL_SDNE)
Chip select valid time - 0.5
t
h(SDCLKL_SDNE)
Chip select hold time 0 -
t
d(SDCLKL_SDNRAS
SDNRAS valid time - 0.5
t
h(SDCLKL_SDNRAS)
SDNRAS hold time 0 -
t
d(SDCLKL_SDNCAS)
SDNCAS valid time - 0.5
t
h(SDCLKL_SDNCAS)
SDNCAS hold time 0 -
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