How to wake wake up MFS2633 from LPOFF Mode?

[shiqi_seventeen]

hello everyone ,

How to wake wake up MFS2633 from LPOFF Mode?

Please give me some Detailed Process

Thanks！

[TomasVaverka · Accepted solution]

Hello,

The LPOFF mode is intended to place the system in a fully OFF state with no system supplies active. The logic circuitry is supplied internally allowing proper wake up from any of the available wake-up mechanisms, with the minimum current consumption possible.

To enter LPOFF mode, some conditions and commands are required. You can send a SPI request to go to LPOFF mode from INIT_FS state or Normal mode. Two commands must be sent, the second command
(transition to LPOFF mode) must be sent within 10ms after the first command (transition to Pre-LPOFF mode) is sent. Passed the 10ms, the FS26 will go to the INIT_FS state.

Write the below commands to FS_LP_REQ register:
1. FS_LP_REQ[7:0] = A5h ➙ Transition to Pre-LPOFF mode
2. FS_LP_REQ[7:0] = 5Ah ➙ Transition to LPOFF mode

Before sending the request, you must select a way to wake-up from low power or else, the FS26 will be
stuck until a power-on reset event. The wake up signals must be enabled through the M_WIO_CFG register: 

The picture below illustrates the transition to the LPOFF mode.

BR, Tomas

[shiqi_seventeen]

Wow，Cool！Thanks Tomas
And there is also a question：When MC33772C is sleeping, IO cannot be maintained at the level before MC33772C sleeps.And how to make it maintained at the level before sleeps?