Electrical specifications

L9951 / L9951XP

18/36

Doc ID 14173 Rev 9

Figure 7.

SPI - driver turn-on/off timing, minimum CSN HI time

Figure 8.

SPI - timing of status bit 0 (fault condition)

CSN

dON

t

20%

80%

tr in

f in

t

OFF

t

dOFF

t

OFF state

ON state

OFF state

ON state

ON

t

output current

of a driver

50%

50%

80%

20%

20%

80%

50%

output current

of a driver

CSN low to high: data from shift register

is transferred to output power switches

t

CSN_HI,min

CSN

CLK

DI

DO

CSN high to low and CLK stays low: status information of data bit 0 (fault condition) is transfered to DO

DI: data is not accepted

DO: status information of data bit 0 (fault condition) will stay as long as CSN is low

time

time

time

time

0

-