Datasheet
DocID027590 Rev 4 189/227
STM32F745xx STM32F746xx Electrical characteristics
195
5.3.28 Quad-SPI interface characteristics
Unless otherwise specified, the parameters given in Table 106 and Table 107 for Quad-SPI
are derived from tests performed under the ambient temperature, f
AHB
frequency and V
DD
supply voltage conditions summarized in Table 17: General operating conditions, with the
following configuration:
• Output speed is set to OSPEEDRy[1:0] = 11
• Capacitive load C = 20 pF
• Measurement points are done at CMOS levels: 0.5 ₓ V
DD
Refer to Section 5.3.17: I/O port characteristics for more details on the input/output alternate
function characteristics.
Table 105. LPSDR SDRAM write 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
d(SDCLKL _Data
) Data output valid time - 4
t
h(SDCLKL _Data)
Data output hold time 0 -
t
d(SDCLKL_Add)
Address valid time - 3.5
t
d(SDCLKL-SDNWE)
SDNWE valid time - 0.5
t
h(SDCLKL-SDNWE)
SDNWE hold time 0 -
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
d(SDCLKL-SDNCAS)
SDNCAS hold time 0 -
Table 106. Quad-SPI characteristics in SDR mode
(1)
Symbol Parameter Conditions Min Typ Max Unit
Fck1/t(CK)
Quad-SPI clock
frequency
2.7 V≤ V
DD
<3.6 V
CL=20 pF
- - 108
MHz
1.71 V<V
DD
<3.6 V
CL=15 pF
- - 100
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from