Hi team,
/FAULT and /STALL pin are open-drain output, but there is pull-up source inside of IC when I see the block diagram. If i use Vcc=3.3V, is there any issue by pull-ed up to 1.8V externally in order to connect to 1.8V MCU?
Regards,
Hayashi
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Hi team,
/FAULT and /STALL pin are open-drain output, but there is pull-up source inside of IC when I see the block diagram. If i use Vcc=3.3V, is there any issue by pull-ed up to 1.8V externally in order to connect to 1.8V MCU?
Regards,
Hayashi
Hello Hayashi-san,
Is there a reason why VCC itself can't be supplied with 1.8 V.
Best,
Keerthi
Hi Keerthi,
There are limited available connector between MCU and DRV8213 as below. Is customer able to operate without issue?
Regards,
Hayashi
Hi Hayashi-san,
There is no internal pullup on nFAULT (block diagram mistake) and for the nSTALL has an internal pullup that gets disabled after startup. The setup should be fine as VIH is 1.45 V.
Best,
Keerthi
Hi Keerthi,
for the nSTALL has an internal pullup that gets disabled after startup
Could you please explain clearly? Do yo mean there are no valid internal pull-up while Vcc is supplied?
The setup should be fine as VIH is 1.45 V.
I think the spec is for input. Please consider whether it is alright to put two different voltage on the same open-drain output?
Regards,
Hayashi
Hello Hayashi-san,
The internal pullup on nSTALL is used internally to see if stall detection is enabled or not on power up (nSTALL to GND to disable). After that initial start up that pullup path gets disabled. The customer application still looks fine to me as it will still register as a logic high.
Best,
Keerthi
Hi Keerthi,
I think i can understand. Let me summarize again. After start-up, the internal pull-up resistor to Vcc is disbaled, so open-drain output will not be 3.3V, will be 1.8V from external pull-up source when the motor is not stall. Is it correct?
Regards,
Hayashi