L9026 datasheet(15/60 Pages) STMICROELECTRONICS

15 / 60 page

Figure 6. State diagram

Limp home mode

Sleep mode

Active mode

Idle mode

Idle="low"

INn="low

" *

The state transition Active to Sleep will happen only if no channel is active

Idle="high"& INn="high"

Idle="low" & INn="high"

Idle="low"

Idle="low" & INn="high"

Idle="low"

Idle="high"

CFG_1.ACT=0 & PWM_SPI.OUTn=0 &

(PWM_MAPn=0 or

selected internal PWM=0)

&(MAP_INn.OUTn=0 or INn="low"

)

CFG_1.ACT=1 or

PWM_SPI.OUTn=1 or

(PWM_MAPn=1 &

selected internal PWM=1)

or (MAP_INn.OUTn=1 & INn="high")

Active

The active mode is the default operation for the switching on of the loads. If L9026 is not in active mode and it

happens a request to switch on outputs through SPI or Input pins, the device enters in active mode or limp home

mode, Based on the state of the IDLE pin. The turn on time tON increases due to the transitions latency.

Table 10. Functions availability in different supply conditions shows the links among the device operation modes,

the channels operability, SPI communications, registers and supply voltages.

L9026

Power supply

DS13397 - Rev 9

page 15/60

L9026 Datasheet(PDF) 15 Page - STMicroelectronics