L9177 datasheet(27/49 Pages) STMICROELECTRONICS

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L9177

Electrical specifications

3.5.18

SPI interface

Figure 16. -SO loading for disable time measurement

Figure 17. SPI timing diagram

Table 24. SPI characteristics and timings

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

SICin

Input capacitance

SCKCin

tSCKCS

Clock inactive time before

frame

100

tCSSO

Access time

See Figure 17

500

tSOdis

Output data (SO) disable time

No Capacitor on SO,

See Figure 16

500

tlead

Channels elect (CS) lead

time

See Figure 17

500

tSCKFSO

Output valid time

See Figure 17, @ fCLK = 5.4 MHz

tSOCS

Output data (SO) disable time No capacitor on SO, see Figure 17

500

tSIsetup

Input data (SI) set-up time

See Figure 17, @ fCLK = 5.4 MHz

tSIhold

Input data (SI) hold time

See Figure 17, @ fCLK = 5.4 MHz

tSCK

CLK period

185

tCSCK

Clock inactive time after

frame

600

tCSN

CS de asserted time

600

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