OMAP3530+TPS65930: about Sleep mode

jiangao peng

Other Parts Discussed in Thread: TPS65930, OMAP3530

Hi:

We connect nSleep1 of tps65930 to SYS_OFF_MODE of omap3530 now. When in sleep mode, the SYS_OFF_MODE pin should be low and the group resource of nSleep1 should be inactive(vdd1 and vdd2 is 0V).

My qustion:

0: Is the SYS_OFF_MODE low(0V) surely in sleep mode?

1: How can i do a active to sleep transtion on omap3530?

2: I configure the SYS_OFF_MODE pin as a GPIO pin (GPIO9) and configure it output low , but the vdd1 and vdd2 is 1.2V yet, why?

Thanks!

over 16 years ago

0 Gandhar Dighe over 16 years ago

TI__Genius 15100 points

Hi,

If you do not have a sleep sequence programmed then toggling the sleep input to TPS65930 will not have any effect.

Please see chapter 5 in the TRM to see how sleep sequence is programmed. If you have any questions then let me know.

Regards,

Gandhar.

0 jiangao peng over 16 years ago in reply to Gandhar Dighe

Prodigy 80 points

Hi Gandhar:

I did the program as follows:

1> Put VDD1 to the group of P1

2> Do the Active to Sleep sequence.

3> Pull down GPIO9 (nSleep1) to change TPS65930 to sleep mode.

But i failed, Why ?

By the way, when OMAP3530 change to sleep mode, Is the SYS_OFF_MODE pin surely low?

Regards.

0 Gandhar Dighe over 16 years ago in reply to jiangao peng

TI__Genius 15100 points

I am hoping that you are using the correct two step sequence for active-2-sleep.

Please let me know what you mean by "failed". When VDD1 is in sleep the voltage level remains the same. It goes to a low power consumption mode.

About SYS_OFF_MODE you will have to check with OMAP support. I dont know about that.

Regards.

0 jiangao peng over 16 years ago in reply to Gandhar Dighe

Prodigy 80 points

Hi Gandhar:

The "failed" i mean is that VDD1 is the same voltage level when in sleep mode.

Perhaps it works well!

Thanks.

0 Gandhar Dighe over 16 years ago in reply to jiangao peng

TI__Genius 15100 points

Hi,

You can check the consumption to see the difference in sleep.

Power management

Power management forum

OMAP3530+TPS65930: about Sleep mode