MC33FS8430G1ES Status conversion condition

[jingfang]

According to the spec process, our design is as follows,premise:

Vsup = 24V(always connect the battery)    wake1:control by mcu,the MCU detects whether a key is inserted to determine wake1 status.   wake2:control by external buttons

Plan on:

In normal state , the MCU detects that the key is not conneted:Set GoTo_STBY =1;Wake1 = 0;

The State change to Standby.

Plan on:

In Standby state , the MCU can't work ,the external button is pressed: 

The State change to normal.

In Standby state , the MCU can't work , the external button is not pressed(set Wake2=0): 

The State change to Powerdown.

Plan on:

In Powerdown state, hold down the external button of more than 300ms

The State change to standby ,beacse of hold down the external button ,so the state change to normal.

[JozefKozon]

Dear 婧芳 郑,

thank you for the description. Do you have a question?

With Best Regards,

Jozef

[jingfang]

I wonder if my design is up to specification,beacuse now in the design phase.

How do I get the PROB_MAIN status?

[JozefKozon]

Dear 婧芳 郑,

for the PORB status please refer to the section 32.9.1 in the FS84-85 datasheet.

With Best Regards,

Jozef

[jingfang]

To MCU PORB is currently designed for I/O connceted to mcu.

Whether PGOOD is equal to PORB_MAIN?

PGOOD low level in standby and power down,but power down need PORB_MAIN = 1,it looks a little strange.

[JozefKozon]

Dear 婧芳 郑,

please see below a question from another customer and an answer from an application engineer regarding the PORB.

DESCRIPTION

Q2. What is the PORB_MAIN as well as PORB_FS referred to in the functional state diagram?

A2: The PORB_MAIN=1  or  PORB_FS=1  means the Main logic or FS logic is ok.

With Best Regards,

Jozef

[jingfang]

As long as the SBC is normal ,PROB_MAIN =1. It is right?Are my predicted state transition conditions correct?

[JozefKozon · Accepted solution]

Dear 婧芳 郑,

As long as the SBC is normal ,PROB_MAIN =1. It is right?Are my predicted state transition conditions correct?

[A] Yes, that is correct. But do not also forget about the PORB_FS=1 referring to the Fail Safe.

With Best Regards,

Jozef