BQ76952: Wake Up from Deep Sleep Mode.

Anandteerth Wadavi

Part Number: BQ76952

Hi Matt,

How can the CMU be recovered from Deep Sleep Mode without the aid of MCU ? Can we use LD Pin here or any other technique ?

Thanks in advance.

over 3 years ago

0 Matt Sunna over 3 years ago

TI__Guru* 81035 points

Hi Anandteerth,

The RST_SHUT pin can be used, but you will need to come up with a way of pulsing it high for less than 1 second. You must be able to communicate with the device to enter DEEPSLEEP mode though. There is also the option to leave the LDOs active during DEEPSLEEP to keep the MCU powered.

Best regards,

Matt

0 Anandteerth Wadavi over 3 years ago in reply to Matt Sunna

Prodigy 105 points

Dear Matt,

1. Can we set one of the GPIO of CMU to a known Logic level if the Load current is less than a threshold and reset the same GPIO if the Load current is above the threshold ?

2. Can we set an another GPIO to a known Logic level if the Pack current is in discharge Mode and reset the same GPIO if the Pack current is in charge Mode.

Thanks.

0 Matt Sunna over 3 years ago in reply to Anandteerth Wadavi

TI__Guru* 81035 points

Hi Anandteerth,

No, this is not possible.

Regards,

Matt

0 Anandteerth Wadavi over 3 years ago in reply to Matt Sunna

Prodigy 105 points

Thanks Matt for the reply ; Looks like Host needs to read CMU to know the load current and also the if its in charge or discharge Mode, though CMU can not set the GPIOs for the same.

Regards,

Power management

Power management forum

BQ76952: Wake Up from Deep Sleep Mode.