STM32F722IC datasheet(166/229 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F722xx STM32F723xx

166/229

DS11853 Rev 6

SPI interface characteristics

Unless otherwise specified, the parameters given in Table 81 for the SPI interface are

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

supply voltage conditions summarized in Table 16, with the following configuration:

•

Output speed is set to OSPEEDRy[1:0] = 11

•

Capacitive load C = 30 pF

•

Measurement points are done at CMOS levels: 0.5VDD

Refer to Section 6.3.20: I/O port characteristics for more details on the input/output alternate

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

Table 81. SPI dynamic characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

SPI1,4,5

2.7≤VDD≤3.6

54(2)

MHz

Master mode

SPI1,4,5

1.71≤VDD≤3.6

Master transmitter mode

SPI1,4,5

1.71≤VDD≤3.6

Slave receiver mode

SPI1,4,5

1.71≤VDD≤3.6

Slave mode transmitter/full duplex

SPI1,4,5

2.7≤VDD≤3.6

50(3)

Slave mode transmitter/full duplex

SPI1,4,5

1.71≤VDD≤3.6

37(3)

Master & Slave mode

SPI2,3

1.71≤VDD≤3.6

tsu(NSS)

NSS setup time

Slave mode, SPI presc = 2

4xTpclk

th(NSS)

NSS hold time

Slave mode, SPI presc = 2

2xTpclk

tw(SCKH)

tw(SCKL)

SCK high and low time

Master mode

Tpclk-1

Tpclk

Tpclk+1

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