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STM32F732IE bảng dữ liệu(PDF) 162 Page - STMicroelectronics

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STM32F732IE bảng dữ liệu(HTML) 162 Page - STMicroelectronics

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Electrical characteristics
STM32F732xx STM32F733xx
162/226
DS11854 Rev 6
The SDA and SCL I/O requirements are met with the following restrictions: the SDA and
SCL I/O pins are not “true” open-drain. When configured as open-drain, the PMOS
connected between the I/O pin and VDD is disabled, but is still present.
The 20mA output drive requirement in Fast-mode Plus is not supported. This limits the
maximum load Cload supported in Fm+, which is given by these formulas:
•
Tr(SDA/SCL)=0.8473 x Rp x Cload
•
Rp(min)= (VDD - VOL(max))/IOL(max)
Where Rp is the I2C lines pull-up. Refer to
Section 6.3.20: I/O port characteristics for the
I2C I/Os characteristics.
All I2C SDA and SCL I/Os embed an analog filter. Refer to the table below for the analog
filter characteristics:
Table 79. Minimum I2CCLK frequency in all I2C modes
Symbol
Parameter
Condition
Min
Unit
f(I2CCLK)
I2CCLK
frequency
Standard-mode
-
2
MHz
Fast-mode
Analog Filter ON
DNF=0
10
Analog Filter OFF
DNF=1
9
Fast-mode Plus
Analog Filter ON
DNF=0
22.5
Analog Filter OFF
DNF=1
16
Table 80. I2C analog filter characteristics(1)
1. Guaranteed by characterization results.
Symbol
Parameter
Min
Max
Unit
tAF
Maximum pulse width of spikes that
are suppressed by the analog filter
50(2)
2. Spikes with widths below tAF(min) are filtered.
260(3)
3. Spikes with widths above tAF(max) are not filtered
ns



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