STM32F051K4U6 Datasheet, PDF (86/104 Pages) STMicroelectronics – Low- and medium-density advanced ARM™-based 32-bit MCU with 16 to 64 Kbytes Flash, timers, ADC, DAC and comm. interfaces

STM32F051x
Table 65. I2C analog filter characteristics⁽¹⁾
Symbol
Parameter
Min
t_SP
Pulse width of spikes that are
suppressed by the analog filter
50
1. Guaranteed by design, not tested in production.
Figure 25. I²C bus AC waveforms and measurement circuit
6$$
6$$
)^#BUS
2
2
Ω
-#5
Ω
3$!
3#,
Electrical characteristics
Max
Unit
260
ns
3$ !
TF3$!
3 4!24
3 4!242%0%!4%$
TSU34!
3 4!24
TR3$!
TSU3$!
TH34!
TW3#,,
TH3$!
3 4/0
TW34/34!
3#,
TW3#,(
TR3#,
TF3#,
TSU34/
-36
1. Measurement points are done at CMOS levels: 0.3 V_DD and 0.7 V_DD.
SPI/I²S characteristics
Unless otherwise specified, the parameters given in Table 66 for SPI or in Table 67 for I²S
are derived from tests performed under ambient temperature, f_PCLKx frequency and V_DD
supply voltage conditions summarized in Table 20.
Refer to Section 6.3.13: I/O port characteristics for more details on the input/output alternate
function characteristics (NSS, SCK, MOSI, MISO for SPI and WS, CK, SD for I²S).
Table 66. SPI characteristics
Symbol
Parameter
f_SCK
1/t_c(SCK)
t_r(SCK)
t_f(SCK)
SPI clock frequency
SPI clock rise and fall
time
Conditions
Master mode
Slave mode
Capacitive load: C = 15 pF
Min
Max
Unit
-
18
MHz
-
18
-
6
ns
Doc ID 022265 Rev 3
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