NXP Semiconductors LPC86 Series Hardware Design Manual
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NXP Semiconductors LPC86 Series Hardware Design Manual

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LPC86XHDG
LPC86x Hardware Design Guide
Rev. 0 — 8 May 2023
Document Information
Information
Keywords
Abstract
Content
LPC86x, hardware design, LPC86x power circuit
This document provides guide for LPC86x hardware design, including power system, clock, pin
status, and PCB layout.
User guide

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Summary of Contents for NXP Semiconductors LPC86 Series

  • Page 1 LPC86XHDG LPC86x Hardware Design Guide Rev. 0 — 8 May 2023 User guide Document Information Information Content Keywords LPC86x, hardware design, LPC86x power circuit Abstract This document provides guide for LPC86x hardware design, including power system, clock, pin status, and PCB layout.

  • Page 2: Introduction

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide 1 Introduction The LPC86x is introduced to market by NXP. It is an Arm Cortex-M0+ based, low-cost 32-bit MCU supporting up to 64 kB of flash memory and 8 kB of SRAM. This document provides guide for LPC86x hardware design, including power system, clock, pin status, and PCB layout.
  • Page 3 LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide Figure 1. Bulk and decoupling capacitors for LPC86x LQFP64 • Figure 2 is for LPC86x HVQFN48 package. Figure 2. Bulk and decoupling capacitors for LPC86x HVQFN48 • Figure 3 is for LPC86x HVQFN32 package. LPC86XHDG All information provided in this document is subject to legal disclaimers.

  • Page 4: Power Measurement

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide Figure 3. Bulk and decoupling capacitors for LPC86x HVQFN32 2.3 Power measurement For LPC86x chip power consumption measurement, the measurement circuits is as shown in Figure 4. Only the current into LPC86x VDD should be measured. P1 is designed for the measurement of LPC86x total current here using multi-meter's voltage mode, by measuring the voltage on R24, then calculate the current by dividing by the resistance value of R24.

  • Page 5: Board Design For Vrefp And Vrefn

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide 2.4 Board design for VREFP and VREFN To improve ADC conversion accuracy, ADC module provide VREFP and VREFN inputs as accurate external reference voltage. For best performance, normally select VREFP and VREFN at the same voltage levels as VDD and VSS.

  • Page 6: Xtal Oscillator Mode

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide 3.1 XTAL oscillator mode In the XTAL oscillator circuit, only the crystal (XTAL) and the capacitances CX1 and CX2 must be connected externally to XTALIN and XTALOUT, as shown in Figure Figure 6. XTAL oscillator operation circuit...

  • Page 7: I3C Circuit

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide Figure 7. Slave mode operation of the on-chip oscillator C circuit LPC86x provides the MIPI Alliance Improved Inter-Integrated Circuit (MIPI I C). It brings major improvements in use and power over I C and provides an alternative to SPI for mid-speed applications with bus capable of 12 MHz clock speeds.

  • Page 8: Pin State And Unused Pins Termination

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide This design has the default function of I C connection. When the I C connection is required, remove R56 and install R58 and R59. Figure 8. A sample design for I C circuit compatible with I...

  • Page 9: General Pcb Layout Guide

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide 6 General PCB layout guide 6.1 PCB layout suggestions for crystal oscillator circuit The crystal oscillator is an analog circuit and must be designed carefully according to the analog-board layout rules: • Signal traces to the XTAL/EXTAL pins, the crystal and the external capacitors must be as short as possible, these traces pins should only be connected to required oscillator components and must not be connected to any other devices or components.

  • Page 10: Emi/Emc And Esd Considerations For Layout

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide Table 5. Flextime PWM channels pin assignment ...continued Function name Type Selection 0 Selection 1 Selection 2 Selection 3 FTM0_CH2 P0_19 P1_3 P1_2 Not connected FTM0_CH3 P0_20 P1_4 P0_27 Not connected FTM0_CH4 P0_21 P1_5...
  • Page 11 LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide • Ensure that the power supply is rated for the application and optimized with decoupling capacitors. • Provide adequate filter capacitors on the power supply source. The bulk/bypass and decoupling capacitors should have low equivalent series inductance (ESL).

  • Page 12: Eft Considerations For Layout

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide 6.4 EFT considerations for layout Electrical Fast Transients (EFT) are a series of quick, high frequency pulses often caused by arcing. A common cause of power line transients occurs when an AC/DC connection is made or broken, equipment powered down, or circuit breakers switched.

  • Page 13: References

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide Figure 11. Reflow soldering of the HVQFN32 (5x5) package 7 References 1. Hardware Design Guidelines for S32K1xx Microcontrollers (document AN5426) 2. Hardware Design Guidelines for LPC55(S)xx Microcontrollers (document AN13033) 3. LPC86x User manual (document UM11607) 4.

  • Page 14: Revision History

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide 8 Revision history Table 7 summarizes the revisions to this document. Table 7. Revision history Revision number Date Substantive changes 08 May 2023 Initial release LPC86XHDG All information provided in this document is subject to legal disclaimers.

  • Page 15: Legal Information

    NXP Semiconductors. In the event that customer uses the product for design-in and use in In no event shall NXP Semiconductors be liable for any indirect, incidental, automotive applications to automotive specifications and standards, punitive, special or consequential damages (including - without limitation - customer (a) shall use the product without NXP Semiconductors’...
  • Page 16 LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide AMBA, Arm, Arm7, Arm7TDMI, Arm9, Arm11, Artisan, big.LITTLE, Cordio, CoreLink, CoreSight, Cortex, DesignStart, DynamIQ, Jazelle, Keil, Mali, Mbed, Mbed Enabled, NEON, POP, RealView, SecurCore, Socrates, Thumb, TrustZone, ULINK, ULINK2, ULINK-ME, ULINK- PLUS, ULINKpro, μVision, Versatile — are trademarks and/or registered trademarks of Arm Limited (or its subsidiaries or affiliates) in the US and/or elsewhere.

  • Page 17: Table Of Contents

    LPC86XHDG NXP Semiconductors LPC86x Hardware Design Guide Contents Introduction ............2 Power system ............2 Power supply configurations ......2 Bulk and decoupling capacitors ......2 Power measurement ..........4 Board design for VREFP and VREFN ....5 Clock circuit ............5 XTAL oscillator mode .........6 Slave mode (External clock input mode) ...

Table of Contents