LPC54018 supply voltage

[andrewsglenn]

We're looking at using the LPC54018J4M in a project, interfacing with 1.8V peripherals.

On the product page (https://www.nxp.com/part/LPC54018J4MET180#/) it says the supply voltage is 1.71V to 3.6V

When I look at UM11155, page 6, it says Single power supply 2.7 V to 3.6 V.

Can we power the LPC54018J4M from a 1.8V supply?

[xiangjun_rong · Accepted solution]

Hi,

You are right, the LPC54018J4M embedded Winbond W25Q32JV, pls download the data sheet of W25Q32JV from the website:

https://www.winbond.com/resource-files/w25q32jv%20revg%2003272018%20plus.pdf

This is the VDD requirement for the W25Q32JV.

The minimum VDD voltage is 2.7V

Hope it can help you

BR

XiangJun Rong

[andrewsglenn]

I thought it might be something like that.

2 questions:

1. If we were to use the LPC54S016JET100 with a 1.8V Flash, can we program the flash through the SWD connection on the MCU, or do we need to use the bootloader?
2. Is there a power calculator available anywhere? I'll need to work out the size of our 1.8V supply.

Thanks,

Glenn

[xiangjun_rong]

Hi,

1.If we were to use the LPC54S016JET100 with a 1.8V Flash, can we program the flash through the SWD connection on the MCU, or do we need to use the bootloader?

>>>>>>Yes, you can program external spifi flash with SWD based on MCUXPresso tools, if it does not support the flash, you have to modify the *.cfx file.

This is the table the default spifi flash part number the current *.cfx supports.

For detailed inf, pls refer to the MCUXPresso_IDE_User_Guide.pdf located at:

C:\nxp\MCUXpressoIDE_11.8.0_1165

Secondly, you can download the flashloader to the RAM, using blhost tools to download via uart or usb in ISP mode.

Q2.Is there a power calculator available anywhere? I'll need to work out the size of our 1.8V supply.

>>>>>>pls download data sheet of LPC540xx from the link:

https://www.nxp.com.cn/docs/en/data-sheet/LPC540xx.pdf

and check the section 10.3 Power consumption for the power consumption for both core and peripherals based on clock frequency.

Hope it can help you

BR

XiangJun Rong

[andrewsglenn]

Hi XiangJun,

All those parts are 3.3V parts.

If we're running at 1.8V, has NXP certified any Flash parts we should use?

Regards,

Glenn

[xiangjun_rong]

Hi,

On our LPC54628-EVK board, it is said that "For 1.8V board version use MX25R6435FM2IL0, or IS25LP128F-JBLE".

Pls try to consider them.

BR

XiangJun Rong

[andrewsglenn]

Will do, thank you!

[xiangjun_rong]

Hi,

As the following section 10.1 General Operating conditions in data sheet of LPC540xx, the VDD can be 1.8V, but if you want to program OTP, the VDD power supply voltage must be 2.7V or above. if you use full speed USB, the VDD power supply voltage must be 3.0V or above.

Hope it can help you

BR

XiangJun Rong

[andrewsglenn]

Hi again.

The Revision 1.3 datasheet from 15 September 2020 shows a minimum Vdd of 2.7V, which is what is confusing me. This is the datasheet available for download from the NXP web site.

Is this because the LPC54018J4M contains an internal SPI flash that needs a higher voltage?

[andrewsglenn]

Thank you for the information!

Just to confirm, we can program Flash at 1.8V, just not the OTP memory?

I think I'm good keeping with USB FS to be able to interface more easily to the rest of the components.

Does NXP have a system power calculator so I can work out the maximum supply current needed at 1.8V?

Regards,

Glenn