STM32L4S5AI datasheet(216/275 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L4S5xx, STM32L4S7xx and STM32L4S9xx

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DocID030322 Rev 2

SPI characteristics

Unless otherwise specified, the parameters given in Table 92 for SPI are derived from tests

performed under the ambient temperature, fPCLKx frequency and supply voltage conditions

summarized in Table 22: General operating conditions.

•

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

•

Capacitive load C = 30 pF

•

Measurement points are done at CMOS levels: 0.5 x VDD

Refer to Section 6.3.17: I/O port characteristics for more details on the input/output alternate

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

Table 92. SPI characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max(2)

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

2.7 V < VDD < 3.6 V

Voltage Range V1

MHz

Master mode

1.71 V < VDD < 3.6 V

Voltage Range V1

Master transmitter mode

1.71 V < VDD < 3.6 V

Voltage Range V1

Slave receiver mode

1.71 V < VDD < 3.6 V

Voltage Range V1

Slave mode transmitter/full duplex

2.7 V < VDD < 3.6 V

Voltage Range V1

Slave mode transmitter/full duplex

1.71 V < VDD < 3.6 V

Voltage Range V1

1.71 V < VDD < 3.6 V

Voltage Range V2

1.08 V < VDD < 1.32 V(3)

tsu(NSS) NSS setup time

Slave mode, SPI prescaler = 2

4ₓTPCLK

th(NSS) NSS hold time

Slave mode, SPI prescaler = 2

2ₓTPCLK

tw(SCKH)

tw(SCKL)

SCK high and low time

Master mode

TPCLK-1

TPCLK

TPCLK+1

tsu(MI)

Data input setup time

Master mode

tsu(SI)

Slave mode

2.5

th(MI)

Data input hold time

Master mode

th(SI)

Slave mode

5.5

ta(SO)

Data output access time Slave mode

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