L9950

20/23

Figure 10. SPI - DRIVER TURN ON/OFF TIMING, MINIMUM CSN HI TIME

Figure 11. SPI - TIMING OF STATUS BIT 0 (FAULT CONDITION)

CSN

dON

t

20%

80%

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

-