STM32F411RET6 datasheet(107/149 Pages) STMICROELECTRONICS

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STM32F411xC STM32F411xE

Electrical characteristics

123

SPI interface characteristics

Unless otherwise specified, the parameters given in Table 60 for the SPI interface are

derived from tests performed under the ambient temperature, fPCLKx frequency and VDD

supply voltage conditions summarized in Table 14, 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 6.3.16: I/O port characteristics for more details on the input/output alternate

function characteristics (NSS, SCK, MOSI, MISO for SPI).

Table 60. SPI dynamic characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master full duplex/receiver mode,

2.7 V < VDD < 3.6 V

SPI1/4/5

MHz

Master full duplex/receiver mode,

3.0 V < VDD < 3.6 V

SPI1/4/5

Master transmitter mode

1.7 V < VDD < 3.6 V

SPI1/4/5

Master mode

1.7 V < VDD < 3.6 V

SPI1/2/3/4/5

Slave transmitter/full duplex mode

2.7 V < VDD < 3.6 V

SPI1/4/5

38(2)

Slave receiver mode,

1.8 V < VDD < 3.6 V

SPI1/4/5

Slave mode,

1.8 V < VDD < 3.6 V

SPI1/2/3/4/5

Duty(SCK)

Duty cycle of SPI clock

frequency

Slave mode

tw(SCKH)

tw(SCKL)

SCK high and low time Master mode, SPI presc = 2

TPCLK−1.5

TPCLK

+1.5

tsu(NSS)

NSS setup time

Slave mode, SPI presc = 2

3TPCLK

th(NSS)

NSS hold time

Slave mode, SPI presc = 2

2TPCLK

tsu(MI)

Data input setup time

Master mode

tsu(SI)

Slave mode

2.5

th(MI)

Data input hold time

Master mode

7.5

th(SI)

Slave mode

3.5

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