STM32WLE4JC datasheet(130/145 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32WLE5/E4xx

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DS13105 Rev 8

SPI characteristics

Unless otherwise specified, the parameters given in the table below are derived from tests

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

summarized in Table 25: General operating conditions, with the following configuration:

•

output speed set to OSPEEDRy[1:0] = 11

•

capacitive load C = 30 pF

•

measurements done at CMOS levels: 0.5 x VDD

Refer to Section 5.3.16: 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

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

1.8 < VDD < 3.6 V, Range 1

MHz

Master transmitter mode

1.8 < VDD < 3.6 V, Range 1

Slave receiver mode

1.8 < VDD < 3.6 V, Range 1

Slave mode transmitter/full duplex

2.7 < VDD < 3.6 V, Range 1

24(2)

Slave mode transmitter/full duplex

1.8 < VDD < 3.6 V, Range 1

24(2)

tsu(NSS) NSS setup time

Slave mode, SPI prescaler = 2

3 x TPCLK

th(NSS) NSS hold time

Slave mode, SPI prescaler = 2

2 x TPCLK

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

th(MI)

Data input hold time

Master mode

th(SI)

Slave mode

ta(SO)

Data output access time

Slave mode

912

tdis(SO) Data output disable time

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