MPC5746C: force reset

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MPC5746C: force reset

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Contributor II

Is it possible to force MPC5746C reset?

for example, MC9S12XDT will go reset when I set AMRCOP register 0xFF.

is there any register of MPC5746C which is able to reset it?

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NXP TechSupport
NXP TechSupport

Hi, you can use the MC_ME module to enter the RESET mode (SW functional reset):

 

/* software reset */   

ME.MCTL.R = 0x00005AF0;

ME.MCTL.R = 0x0000A50F;

 

or for SW destructive reset

ME.MCTL.R = 0xF0005AF0;

ME.MCTL.R = 0xF000A50F;

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NXP TechSupport
NXP TechSupport

Hi, you can use the MC_ME module to enter the RESET mode (SW functional reset):

 

/* software reset */   

ME.MCTL.R = 0x00005AF0;

ME.MCTL.R = 0x0000A50F;

 

or for SW destructive reset

ME.MCTL.R = 0xF0005AF0;

ME.MCTL.R = 0xF000A50F;

View solution in original post

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Contributor III

Hi David,

 I am searching for the same thing for MPC5606B 

I need to do a SW destructive reset ,but I can't find this in the data sheet ,any alternative for this value for MPC5606B ??

I want alternative for this code 

or for SW destructive reset

ME.MCTL.R = 0xF0005AF0;

ME.MCTL.R = 0xF000A50F;

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NXP TechSupport
NXP TechSupport

On MPC5606B there is no option for SW destructive reset, this has been added later. MPC5606B is only possible to reset software way by functional reset.

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Contributor III

So how can I perform a Hard reset (cold boot) from software on MPC5606B ?

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NXP TechSupport
NXP TechSupport

I have found out that Software watchdog can cause destructive reset. Thus you could let watchdog to expire intentionally, but after reset you would have set F_SWT flag, question is whether it would be OK for your application or not.

pastedImage_1.png

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Contributor III

Hi David thank you ,I am confused where did you get this table from my reference manual looks like this ?!

ref_1.png

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NXP TechSupport
NXP TechSupport

Actually, I have taken the screenshot from MPC5607B manual. The whole RGM chapter in MPC5606BRM is somehow "weird", including block diagram where all reset sources disappeared. I have checked with debugger and all reset sources are present.