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STM32F427XX Datasheet, PDF (142/239 Pages) STMicroelectronics – ARM Cortex-M4 32b MCU+FPU, 225DMIPS, up to 2MB Flash/256+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 comm. interfaces, camera & LCD-TFT
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Electrical characteristics
STM32F427xx STM32F429xx
Table 61. I2C analog filter characteristics(1)
Symbol
Parameter
Min
Max
tAF
Maximum pulse width of spikes that
are suppressed by the analog filter
50(2)
260(3)
1. Guaranteed by design.
2. Spikes with widths below tAF(min) are filtered.
3. Spikes with widths above tAF(max) are not filtered
Unit
ns
SPI interface characteristics
Unless otherwise specified, the parameters given in Table 62 for the SPI interface are
derived from tests performed under the ambient temperature, fPCLKx frequency and VDD
supply voltage conditions summarized in Table 17, with the following configuration:
• Output speed is set to OSPEEDRy[1:0] = 10
• Capacitive load C = 30 pF
• Measurement points are done at CMOS levels: 0.5VDD
Refer to Section 6.3.17: I/O port characteristics for more details on the input/output alternate
function characteristics (NSS, SCK, MOSI, MISO for SPI).
Symbol
Table 62. SPI dynamic characteristics(1)
Parameter
Conditions
Min
Typ
Max Unit
Master mode, SPI1/4/5/6,
2.7 V≤VDD≤3.6 V
Slave mode,
Receiver
-
fSCK
1/tc(SCK)
SPI clock frequency
SPI1/4/5/6,
2.7 V≤VDD≤3.6 V
Transmitter/
full-duplex
Master mode, SPI1/2/3/4/5/6,
1.7 V≤VDD≤3.6 V
-
Slave mode, SPI1/2/3/4/5/6,
1.7 V≤VDD≤3.6 V
Duty(SCK)
Duty cycle of SPI clock
frequency
Slave mode
30
45
-
45
38(2)
MHz
22.5
-
22.5
50
70
%
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