STM32F051K4 datasheet(86/104 Pages) STMICROELECTRONICS

部品番号	STM32F051K4

部品情報	Low- and medium-density advanced ARM??based 32-bit MCU

PDF	104 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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86 / 104 page

STM32F051x

Electrical characteristics

Doc ID 022265 Rev 3

87/105

Figure 25.

I2C bus AC waveforms and measurement circuit

Measurement points are done at CMOS levels: 0.3 VDD and 0.7 VDD.

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, fPCLKx frequency and VDD

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 65.

I2C analog filter characteristics(1)

Guaranteed by design, not tested in production.

Symbol

Parameter

Min

Max

Unit

tSP

Pulse width of spikes that are

suppressed by the analog filter

260

Table 66.

SPI characteristics

Symbol

Parameter

Conditions

Min

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

MHz

Slave mode

tr(SCK)

tf(SCK)

SPI clock rise and fall

time

Capacitive load: C = 15 pF

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