DRV201

SLVSB25

– AUGUST 2011

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MODES OF OPERATION

SHUTDOWN

If the driver detects SCL has a DC level below 0.63 V for duration of at least 0.5 ms, the

driver will enter shutdown mode. This is the lowest power mode of operation. The driver will

remain in shutdown for as long as SCL pin remain low.

STANDBY

If SCL goes from low to high the driver enters STANDBY mode and sets the default register

STANDBY mode when VCM_CURRENT register is set to zero. From ACTIVE mode the

device will enter STANDBY if the SW_RST bit of the CONTROL register is set. In this case

all registers will be reset to default values.

STANDBY mode is entered from ACTIVE mode if any of the following faults occur: Over

temperature protection fault (OTPF), VCM short (VCMS), or VCM open (VCMO). When

STANDBY mode is entered due to a fault condition current register is cleared.

ACTIVE

The device is in ACTIVE mode whenever the VCM_CURRENT control is set to something

enabled all the time resulting in higher power consumption. The device remains in active

mode until the SW_RST bit in the CONTROL register is set, SCL is pulled low for duration of

0.5 ms, VCM_CURRENT control is set to zero, or any of the following faults occur: Over

temperature protection fault (OTPF), VCM short (VCMS), or VCM open (VCMO). If active

mode is entered after fault the status register is automatically cleared.

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Copyright

© 2011, Texas Instruments Incorporated