STM8L101F2P3 datasheet(56/77 Pages) STMICROELECTRONICS

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Electrical parameters

STM8L101xx

56/77

Doc ID 15275 Rev 7

9.3.7

Communication interfaces

Serial peripheral interface (SPI)

Unless otherwise specified, the parameters given in Table 31 are derived from tests

performed under ambient temperature, fMASTER frequency and VDD supply voltage

conditions summarized in Section 9.3.1. Refer to I/O port characteristics for more details on

the input/output alternate function characteristics (NSS, SCK, MOSI, MISO).

Table 31.

SPI characteristics

Symbol

Parameter

Conditions(1)

Min

Max

Unit

fSCK

1/tc(SCK)

SPI clock frequency

Master mode

MHz

Slave mode

tr(SCK)

tf(SCK)

SPI clock rise and fall time Capacitive load: C = 30 pF

tsu(NSS)

(2)

NSS setup time

Slave mode

4 x TMASTER

th(NSS)

(2)

NSS hold time

Slave mode

tw(SCKH)

(2)

tw(SCKL)

(2)

SCK high and low time

Master mode,

fMASTER = 8 MHz, fSCK= 4 MHz

105

145

tsu(MI)

(2)

tsu(SI)

(2)

Data input setup time

Master mode

Slave mode

th(MI)

(2)

th(SI)

(2)

Data input hold time

Master mode

Slave mode

ta(SO)

(2)(3)

Data output access time

Slave mode

3x TMASTER

tdis(SO)

(2)(4)

Data output disable time

Slave mode

tv(SO)

(2)

Data output valid time

Slave mode (after enable edge)

tv(MO)

(2)

Data output valid time

Master mode (after enable

edge)

-20

th(SO)

(2)

Data output hold time

Slave mode (after enable edge)

th(MO)

(2)

Master mode (after enable

edge)

Parameters are given by selecting 10 MHz I/O output frequency.

Values based on design simulation and/or characterization results, and not tested in production.

Min time is for the minimum time to drive the output and the max time is for the maximum time to validate the data.

Min time is for the minimum time to invalidate the output and the max time is for the maximum time to put the data in Hi-Z.

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