L9026 datasheet(16/60 Pages) STMICROELECTRONICS

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6.8

Idle mode

In Idle mode, the current consumption of the device reaches the parameters IVDDIO(IDLE) and IVBATT(IDLE).

The internal voltage regulator is still working. ON diagnosis functions are not available. The output channels are

switched OFF, independently of the supply voltages. When VDDIO is available, the SPI registers are working and

SPI communication is possible. In Idle mode the DIAG_OVC_OVT bits are not cleared.

6.9

Active mode

Active mode is the normal operation mode when no Limp Home condition is set and it is necessary to

drive some or all loads. Voltage levels of VDDIO and VBATT influence the behavior as described in detail in

Section 6.1 Overview. Device current consumption is specified with IVDDIO(ACTIVE) and IVBATT(ACTIVE).

In case CFG_1.ACT is set to “1”, the device enters in Active mode and remains in this state independently on the

status of input pins, of internal PWM generators and PWM_SPI.OUTn bits.

Otherwise, in case the bit CFG_1.ACT is not set, in order to move the device in Active mode all conditions below

are needed:

•

the IDLE pin set to “high”

•

the outputs configured as driven either by external pins (through MAPIN0, MAPIN1 registers) or by SPI (at

least one PWM_SPI.OUTn bit is set to “1”) or by the internal PWM generators (through MAP_PWM)

•

at least one channel enabled

In this scenario, the device returns to Idle mode as soon as IDLE pin set to “low”, all inputs pins are set to “low”,

all PWM_SPI.OUTn bits are set to “0” and all the internal pwm generators are OFF.

Being the IDLE pin asserted high, an under voltage condition on VDDIO supply brings the device into Idle mode

once all INn input pins are set to “low”, on top of the setting of the bit CFG_1.ACT.

L9026

Idle mode

DS13397 - Rev 5

page 16/60

L9026 データシート(PDF) 16 Page - STMicroelectronics