DRV8303: reset function

Gehad Elkot

Intellectual 400 points

Part Number: DRV8303
Other Parts Discussed in Thread: DRV8308,

in data sheet :If RESET is high while ENABLE is inactive, then the registers read as 1.

but if enable is active during reset , what will happen in all registers including fault register?

over 3 years ago

0 Aaron Barrera over 3 years ago

TI__Mastermind 26046 points

Hi Gehad,

Thank you for posting to the MD forum!

Let me take a look at this with our EVM and I'll get a response back to you soon.

0 Aaron Barrera over 3 years ago in reply to Aaron Barrera

TI__Mastermind 26046 points

Hi Gehad,

I will be getting to this test this week and provide you a response by the end of this week.

0 Aaron Barrera over 3 years ago in reply to Aaron Barrera

TI__Mastermind 26046 points

Hi Gehad,

When you mention "reset", are you talking about the RESET_GATE bit in SPI?

If RESET_GATE is asserted while ENABLE is active, it will clear any latched faults in the status registers. This is typically how you would clear any faults in the status registers (or by setting ENABLE low for less than 10us).

0 Gehad Elkot over 3 years ago in reply to Aaron Barrera

Intellectual 400 points

Hi Aaron ,

thanks for your response
i mean by reset : the reset pin

datasheet mention one of reset ways: When the RESET pin is high while ENABLE is active.

what happen for registers values?

0 Aaron Barrera over 3 years ago in reply to Gehad Elkot

TI__Mastermind 26046 points

HI Gehad,

The DRV8303 doesn't have a RESET pin. Are you talking about the DRV8308?

0 Gehad Elkot over 3 years ago in reply to Aaron Barrera

Intellectual 400 points

yes, i mean 8308 sorry for this error

0 Aaron Barrera over 3 years ago in reply to Gehad Elkot

TI__Mastermind 26046 points

Hi Gehad,

No worries. When ENABLE is high and RESET is high for longer than 10-us, all registers are reloaded with the values that are contained in OTP memory. All of the faults will be cleared back to 0 and internal states will be initialized.

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DRV8303: reset function