STM32F318C8 datasheet(88/125 Pages) STMICROELECTRONICS

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Electrical characteristics

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SPI/I2S characteristics

Unless otherwise specified, the parameters given in Table 57 for SPI or in Table 58 for I2S

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

supply voltage conditions summarized in Table 20.

Refer to Section 6.3.13: I/O port characteristics for more details on the input/output alternate

function characteristics (NSS, SCK, MOSI, MISO for SPI and WS, CK, SD for I2S).

Table 57. SPI characteristics(1)

1. Data based on characterization results, not tested in production.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

MHz

Slave mode

Slave mode transmitter/full

duplex

13(2)

2. 2.Maximum frequency in Slave transmitter mode is determined by the sum of tv(SO) and tsu(MI) which has

to fit into SCK low or high phase preceding the SCK sampling edge. This value can be achieved when the

SPI communicates with a master having tsu(MI) = 0 while Duty(SCK) = 50%.

tsu(NSS)

NSS setup time

Slave mode, SPI presc = 2

4*Tpcl

th(NSS)

NSS hold time

Slave mode, SPI presc = 2

2*Tpcl

tw(SCKH)

tw(SCKL)

SCK high and low

time

Master mode, fPCLK = 36

MHz, presc = 4

Tpclk-

Tpclk

Tpclk+

tsu(MI)

tsu(SI)

Data input setup time

Master mode

Slave mode

th(MI)

Data input hold time

Master mode

6.5

th(SI)

Slave mode

2.5

ta(SO)

Data output access

time

Slave mode

tdis(SO)

Data output disable

time

Slave mode

tv(SO)

Data output valid time

Slave mode

tv(MO)

Master mode

1.5

th(SO)

Data output hold time

Slave mode

9.5

th(MO)

Master mode

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