STM32F412RG datasheet(128/193 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F412xE/G

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DocID028087 Rev 4

SPI interface characteristics

Unless otherwise specified, the parameters given in Table 64 for the SPI interface are

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

supply voltage conditions summarized in Table 15, 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 64. 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 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

Slave transmitter/full duplex mode

1.7 V < VDD < 3.6 V

SPI1/4/5

35(2)

Slave receiver mode,

1.7 V < VDD < 3.6 V

SPI1/4/5

Slave mode,

1.7 V < VDD < 3.6 V

SPI2/3

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

4.5

tsu(SI)

Slave mode

1.5

th(MI)

Data input hold time

Master mode

th(SI)

Slave mode

0.5

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