LPC4350 datasheet(126/145 Pages) NXP

Part #	LPC4350

Description	32-bit ARM Cortex-M4/M0 MCU; up to 264 kB SRAM; Ethernet two High-speed USBs; advanced configurable peripherals

PDF	145 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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126 / 145 page

LPC4350_30_20_10

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Objective data sheet

Rev. 2.1 — 23 September 2011

126 of 145

NXP Semiconductors

LPC4350/30/20/10

32-bit ARM Cortex-M4/M0 microcontroller

13.3 XTAL and RTCX Printed Circuit Board (PCB) layout guidelines

The crystal should be connected on the PCB as close as possible to the oscillator input

and output pins of the chip. Take care that the load capacitors Cx1, Cx2, and Cx3 in case of

third overtone crystal usage have a common ground plane. The external components

must also be connected to the ground plain. Loops must be made as small as possible in

order to keep the noise coupled in via the PCB as small as possible. Also parasitics

should stay as small as possible. Values of Cx1 and Cx2 should be chosen smaller

accordingly to the increase in parasitics of the PCB layout.

LPC4350 Datasheet(PDF) 126 Page - NXP Semiconductors