SLVAF75 August   2021 DRV10987

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Sleep and Standby Mode
    2. 1.2 Conditions for Entering or Exiting Sleep
    3. 1.3 Sequence to Enter Sleep Mode
  3. 2Implementation
    1. 2.1 Hardware Setup
    2. 2.2 Power Up Sequence With Speed Pin in I2C Speed Command Mode
    3. 2.3 Implementing Option 1
    4. 2.4 Option 1 With Zero Value at Speed Register
    5. 2.5 Implementing C Code With Option 2
    6. 2.6 Implementation of Exiting From Sleep Mode
  4. 3References

2.4 Option 1 With Zero Value at Speed Register

Before executing Step3 and Step4 of Option 1, if the speed value is zero, DRV10987D is not able to enter sleep. Enter a non-zero value in the speed value as the first step in the DRV10987D data sheet . The following results are obtained through this test. Once a zero value is entered and entering sleep mode fails, DRV10987 sleep is not able to enter sleep mode even if a non-zero value is entered afterwords. At first and second speed command, a non-zero value is entered at speed value and the DRV10987 enters sleep mode. But at the third speed command, a zero value is entered at speed value and the DRV10987 is not able to enter sleep mode. After the third speed command, at fourth and fifth speed command non-zero value is entered but DRV10987D is not in sleep mode.

Waveform of Option 1 With Zero Value at Speed Register shows the waveform of Option 1 with a value of zero at the speed register.

GUID-20210707-CA0I-BL5S-GDWV-GFNG0BS9GCXW-low.png
Ch1: 24 V, Ch2: SDA, Ch3: SPEED PIN Ch4: W PHASE VOLT of Motor
Waveform of Option 1 With Zero Value at Speed Register