LPC54XXX Pin function reuse

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LPC54XXX Pin function reuse

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afzhang
Contributor I

Our project used LPC54016JET100 chip. Some pins in our project's circuit diagram need multiplexing function.eg:PIO0_27 pin,PIO0_20 pin.The PIO0_27 pin connects the flash.It also needs output.How to reuse this pin!

I read the LPC540xxx datasheet .The PIO0_20 pin is used as sctimer only for input function. The PIO0_20 pin needs output level and output pwm. How to switch the function of PIO0_20 pin!Thanks!

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nxf58474
NXP Employee
NXP Employee

Hello,

 

Hope you are going well. The pin functions for each pin are mentioned in the Chapter 11 of the User Manual. These functions are defined and cannot be changed, you can only select one of those functions to configure the pin.

 

Table 239.png

 

The PIO0_20 has many options, one of them can be configured in SCT for input only. If you want an output of the module for PWM, you must use a pin that has it, for example the PIO3_14 or the PIO3_28. You can find this information in the Chapter 6 of the Datasheet.

Let me know if you have further questions.

 

Best Regards,

Ricardo

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afzhang
Contributor I

Hi Ricardo:

Thanks!

BR

Aifei Zhang

发件人: nxf58474

发送时间: 2019年12月14日 2:33

收件人: Aifei Zhang

主题: Re: - Re: LPC54XXX Pin function reuse

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Re: LPC54XXX Pin function reuse

reply from Ricardo Zamora <https://community.nxp.com/people/nxf58474?et=watches.email.thread> in LPC Microcontrollers - View the full discussion <https://community.nxp.com/message/1245716?commentID=1245716&et=watches.email.thread#comment-1245716>

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