STM32L151VBH6 데이터 시트보기 (PDF) - STMicroelectronics
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STM32L151VBH6
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STM32L151VBH6 Datasheet PDF : 133 Pages
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STM32L151x6/8/B STM32L152x6/8/B
Electrical characteristics
6.3.16
Communication interfaces
I2C interface characteristics
The STM32L151x6/8/B and STM32L152x6/8/B product line I2C interface meets the
requirements of the standard I2C communication protocol with the following restrictions:
SDA and SCL are not “true” open-drain I/O pins. When configured as open-drain, the PMOS
connected between the I/O pin and VDD is disabled, but is still present.
The I2C characteristics are described in Table 47. Refer also to Section 6.3.12: I/O current
injection characteristics for more details on the input/output alternate function characteristics
(SDA and SCL).
Symbol
Table 47. I2C characteristics
Parameter
Standard mode I2C(1)
Min
Max
Fast mode I2C(1)(2)
Min
Max
Unit
tw(SCLL)
tw(SCLH)
tsu(SDA)
th(SDA)
tr(SDA)
tr(SCL)
tf(SDA)
tf(SCL)
th(STA)
tsu(STA)
SCL clock low time
SCL clock high time
SDA setup time
SDA data hold time
SDA and SCL rise time
SDA and SCL fall time
Start condition hold time
Repeated Start condition
setup time
4.7
-
4.0
-
250
-
0
-
1.3
-
µs
0.6
-
100
-
0
900(3)
-
1000 20 + 0.1Cb
300
ns
-
300
-
300
4.0
-
0.6
-
µs
4.7
-
0.6
-
tsu(STO) Stop condition setup time
4.0
-
0.6
-
μs
tw(STO:STA)
Stop to Start condition time
(bus free)
4.7
-
1.3
-
μs
Cb
Capacitive load for each bus
line
-
400
-
400
pF
1. Guaranteed by design.
2.
faPcChLKie1vmeufsatsbt emaotdleeaI²sCt
2 MHz to achieve standard mode
frequencies. It must be a multiple
I²C frequencies. It must be
of 10 MHz to reach the 400
at least 4 MHz
kHz maximum
to
I²C
fast
mode clock.
3. The maximum Data hold time has only to be met if the interface does not stretch the low period of SCL
signal.
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