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connect pin LPC1788

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connect pin LPC1788

‎02-11-2026 06:46 AM
666 次查看
Aleks710
Contributor I

Hi. What capacity of capacitors connect  to pin  VDD, VSS   LPC1788FBD208, LPC1788FET208  (100nF or 10nF or other)? What capacity of capacitors connect  to pin  VDD-REG3V3, VSS-REG   LPC1788FBD208, LPC1788FET208  (100nF or 10nF or other)? How many capacitors connect   to pin  VDD-VSS; VDD-REG3V3-VSS-REG (capacitor for each VDD, VSS  pin or other)? What is the connection scheme to pins VREFP, VDDA? What is the connection scheme to pin VBAT? What is the connection scheme to pins X1-X2? What is the connection scheme to pins RTCX1- RTCX2? If you have an Application Notes on this topic, please send it.

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‎02-17-2026 05:19 AM
570 次查看
Aleks710
Contributor I

I saw the scheme LPC1788 OEM Board, but it doesn't tell me which capacitors  to install(there are 18 capacitors in total on the scheme, and 13 pairs of pin VDD, VDD-REG3V3). What capacity of capacitors connect  to pin  VDD, VSS   LPC1788FBD208, LPC1788FET208  (100nF or 10nF or other)?  What capacity of capacitors connect  to pin  VDD-REG3V3, VSS-REG   LPC1788FBD208, LPC1788FET208  (100nF or 10nF or other)? How many capacitors connect   to pin  VDD-VSS; VDD-REG3V3-VSS-REG (capacitor for each VDD, VSS  pin or other)? Do I need a ferrite bead between VSS  and VSSA?  On my device fcpu=120MHz, use Ethernet, USB, RTC, 3 UART, 1 CAN, 1 I2C, EMC for SDRAM and NAND Flash, GPIO  

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‎02-13-2026 01:24 PM
603 次查看
luis_maravilla
NXP Employee
NXP Employee

Hello

For the capacitor values and quantities, you could review our partner’s available LPC1788 Developer Kit information as a reference. Please note that this information is provided solely for guidance. Embedded Artists AB | Partner Profile | NXP Semiconductors Inc.

The image in Figure 8 on LPC178x Datasheet shows the power distribution, could you confirm is this the connection scheme that you need? Or could you help us share details about the information that you need?

 

What is the connection scheme to pins X1-X2?

-The chapter 3.8.2 in UM10470, Table 43 and Figure 10 can guide you in the connection and value specifications.

 

What is the connection scheme to pins RTCX1- RTCX2?

-Refer to UM10470 Chapter 29.4 Figure 155

 

Best Regards, Luis

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%3CLINGO-SUB%20id%3D%22lingo-sub-2316481%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%3E%E8%BF%9E%E6%8E%A5%E5%BC%95%E8%84%9A%20LPC1788%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2316481%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%3E%3CH2%20id%3D%22toc-hId--470598041%22%20id%3D%22toc-hId--470571351%22%20id%3D%22toc-hId--470571351%22%20id%3D%22toc-hId--470571351%22%3E%E4%BD%A0%E5%A5%BD%E3%80%82%E8%BF%9E%E6%8E%A5%E5%BC%95%E8%84%9A%20VDD%E3%80%81VSS%20LPC1788FBD208%E3%80%81LPC1788FET208%EF%BC%88100nF%20%E6%88%96%2010nF%20%E6%88%96%E5%85%B6%E4%BB%96%EF%BC%89%E7%9A%84%E7%94%B5%E5%AE%B9%E5%AE%B9%E9%87%8F%E6%98%AF%E5%A4%9A%E5%B0%91%EF%BC%9F%E8%BF%9E%E6%8E%A5%E5%BC%95%E8%84%9A%20VDD-REG3V3%E3%80%81VSS-REG%20LPC1788FBD208%E3%80%81LPC1788FET208%EF%BC%88100nF%20%E6%88%96%2010nF%20%E6%88%96%E5%85%B6%E4%BB%96%EF%BC%89%E7%9A%84%E7%94%B5%E5%AE%B9%E5%AE%B9%E9%87%8F%E6%98%AF%E5%A4%9A%E5%B0%91%EF%BC%9F%E6%9C%89%E5%A4%9A%E5%B0%91%E7%94%B5%E5%AE%B9%E8%BF%9E%E6%8E%A5%E5%88%B0%E5%BC%95%E8%84%9A%20VDD-VSS%EF%BC%9BVDD-REG3V3-VSS-REG%EF%BC%88%E6%AF%8F%E4%B8%AA%20VDD%E3%80%81VSS%20%E5%BC%95%E8%84%9A%E6%88%96%E5%85%B6%E4%BB%96%E5%BC%95%E8%84%9A%E9%83%BD%E6%9C%89%E7%94%B5%E5%AE%B9%EF%BC%89%EF%BC%9F%E4%B8%8E%E5%BC%95%E8%84%9A%20VREFP%E3%80%81VDDA%20%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9FVBAT%20%E5%BC%95%E8%84%9A%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F%E9%92%88%E8%84%9A%20X1-X2%20%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F%E9%92%88%E8%84%9A%20RTCX1-%20RTCX2%20%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F%E5%A6%82%E6%9E%9C%E4%BD%A0%E6%9C%89%E5%85%B3%E4%BA%8E%E8%BF%99%E4%B8%AA%E4%B8%BB%E9%A2%98%E7%9A%84%E5%BA%94%E7%94%A8%E7%AC%94%E8%AE%B0%EF%BC%8C%E8%AF%B7%E5%8F%91%E9%80%81%E3%80%82%3C%2FH2%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-2318058%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%20translate%3D%22no%22%3ERe%3A%20connect%20%20pin%20%20LPC1788%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2318058%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%3E%3CP%3EHello%3C%2FP%3E%0A%3CP%3E%E6%9C%89%E5%85%B3%E7%94%B5%E5%AE%B9%E7%9A%84%E5%80%BC%E5%92%8C%E6%95%B0%E9%87%8F%EF%BC%8C%E6%82%A8%E5%8F%AF%E4%BB%A5%E6%9F%A5%E7%9C%8B%E6%88%91%E4%BB%AC%E5%90%88%E4%BD%9C%E4%BC%99%E4%BC%B4%E6%8F%90%E4%BE%9B%E7%9A%84%20LPC1788%20%E5%BC%80%E5%8F%91%E5%A5%97%E4%BB%B6%E4%BF%A1%E6%81%AF%E4%BD%9C%E4%B8%BA%E5%8F%82%E8%80%83%E3%80%82%E8%AF%B7%E6%B3%A8%E6%84%8F%EF%BC%8C%E8%BF%99%E4%BA%9B%E4%BF%A1%E6%81%AF%E4%BB%85%E4%BE%9B%E5%8F%82%E8%80%83%E3%80%82%20%3CA%20href%3D%22https%3A%2F%2Fwww.nxp.com%2Fwebapp%2Fconnect%2FdisplayPartnerProfile.sp%3FpartnerId%3D10340%26amp%3BofferingId%3D16240%23%3A~%3Atext%3DDEVELOPMENT%2520BOARDS%2FDESIGNS-%2CLPC1788%2520Developer%2527s%2520Kit%2C-Embedded%2520Artists%2527%2520LPC1788%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%22%3EEmbedded%20Artists%20AB%20%7C%E5%90%88%E4%BD%9C%E4%BC%99%E4%BC%B4%E6%A6%82%E5%86%B5%7C%E6%81%A9%E6%99%BA%E6%B5%A6%E5%8D%8A%E5%AF%BC%E4%BD%93%E6%9C%89%E9%99%90%E5%85%AC%E5%8F%B8%3C%2FA%3E%3C%2FP%3E%0A%3CP%3ELPC178x%20%E6%95%B0%E6%8D%AE%E8%A1%A8%E5%9B%BE%208%20%E4%B8%AD%E7%9A%84%E5%9B%BE%E7%89%87%E6%98%BE%E7%A4%BA%E4%BA%86%E7%94%B5%E6%BA%90%E5%88%86%E5%B8%83%EF%BC%8C%E6%82%A8%E8%83%BD%E5%90%A6%E7%A1%AE%E8%AE%A4%E8%BF%99%E5%B0%B1%E6%98%AF%E6%82%A8%E9%9C%80%E8%A6%81%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%EF%BC%9F%E6%88%96%E8%80%85%EF%BC%8C%E6%82%A8%E8%83%BD%E5%90%A6%E5%B8%AE%E5%8A%A9%E6%88%91%E4%BB%AC%E5%88%86%E4%BA%AB%E6%82%A8%E6%89%80%E9%9C%80%E4%BF%A1%E6%81%AF%E7%9A%84%E8%AF%A6%E7%BB%86%E4%BF%A1%E6%81%AF%EF%BC%9F%3C%2FP%3E%0A%3CBR%20%2F%3E%0A%3CP%3E%E9%92%88%E8%84%9A%20X1-X2%20%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F%3C%2FP%3E%0A%3CP%3E-UM10470%20%E4%B8%AD%E7%9A%84%203.8.2%20%E7%AB%A0%E3%80%81%E8%A1%A8%2043%20%E5%92%8C%E5%9B%BE%2010%20%E5%8F%AF%E4%BB%A5%E6%8C%87%E5%AF%BC%E6%82%A8%E4%BA%86%E8%A7%A3%E8%BF%9E%E6%8E%A5%E5%92%8C%E6%95%B0%E5%80%BC%E8%A7%84%E6%A0%BC%E3%80%82%3C%2FP%3E%0A%3CBR%20%2F%3E%0A%3CP%3E%E9%92%88%E8%84%9A%20RTCX1-%20RTCX2%20%E7%9A%84%E8%BF%9E%E6%8E%A5%E6%96%B9%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F%3C%2FP%3E%0A%3CP%3E-%E5%8F%82%E8%A7%81%20UM10470%20%E7%AC%AC%2029.4%20%E7%AB%A0%20%E5%9B%BE%20155%3C%2FP%3E%0A%3CBR%20%2F%3E%0A%3CP%3E%E6%9C%80%E8%AF%9A%E6%8C%9A%E7%9A%84%E9%97%AE%E5%80%99%EF%BC%8C%E8%B7%AF%E6%98%93%E6%96%AF%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-2319023%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%20translate%3D%22no%22%3ERe%3A%20connect%20%20pin%20%20LPC1788%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2319023%22%20slang%3D%22en-US%22%20mode%3D%22CREATE%22%3E%3CH2%20id%3D%22toc-hId--470512696%22%20id%3D%22toc-hId-2016941482%22%3E%E6%88%91%E7%9C%8B%E8%BF%87%20LPC1788%20OEM%20%E6%9D%BF%E6%96%B9%E6%A1%88%EF%BC%8C%E4%BD%86%E5%AE%83%E6%B2%A1%E6%9C%89%E5%91%8A%E8%AF%89%E6%88%91%E8%A6%81%E5%AE%89%E8%A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