In Document PSoC 4100/4200 Family PSoC 4 Registers TRM ,Spec #001-85847 RevA page 474 - Chapter 19.1.11 PWR_BOD_KEY.
It is described that KEY16 shall be copied to key, but is meant with key?
Bits Name Description
15 : 0 KEY16 To detect brown-outs firmware should do this on boot:
1. Set key= KEY16
2. Set KEY16= 0x3A71
3. If key==0x3A71 this was a brown-out event.
To be honest: I do not yet understand what you want to perform. The registers listed in the TRM are very rarely used by us developers since the Cypress IDE (Creator 3.2) handles most of the required jobs with the component's APIs.
Can you tell us what you want to have done?
Have you looked at system ref guide for LVD APIs -
Use of register based programming was extensively used in PSOC 1, and certainly will
continue to be useful in PSOC 3/4/5LP families for core level configuration and even more
flexibility. You have to be careful as there are many sub notes typically with reg programming
that cover impact of doing a specific reg mod and warnings.
Hello Bob and Dana,
I'm sorry, I'm a developer for big series production so I'm not able to update my tools just because there is something new. I need to stick my tested versions. I hope you can understand my concerns. I would use the API's if they would work for my satisfaction and if they cover my wishes.
I just want to activate the brown-out detection. I found no way where it is described where I could activate it or which level will be used.
Alright, I searched the document for brown-out and found this chapter: uint32 CySysGetResetReason(uint32 reason). But there is no description for the brown-out detection itself, its not mentioned in the reset causes and furthermore there is no hint how this detection must be activated.
Look at Help, System Ref Guide, then System Functions to set it up.
To handle the ISR place global system ref component, under System component tab,
and attach an ISR component to it.
In Cypress Capsense solution, we found Cp greater than 45pF, it seems we can not use Auto-tuning way , it will disable the button.
If Cypress capsense solution can deal with this application case when Cp > 45pF ? and how ?
Thanks a lot in advance .