LPC1850 datasheet(121/142 Pages) NXP

Part #	LPC1850

Description	32-bit ARM Cortex-M3 MCU; up to 200 kB SRAM; Ethernet, two High-speed USB, LCD, and external memory controller

PDF	142 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

Logo

121 / 142 page

LPC1850_30_20_10

All information provided in this document is subject to legal disclaimers.

Preliminary data sheet

Rev. 2.2 — 9 September 2011

121 of 142

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 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.

LPC1850 Datasheet(PDF) 121 Page - NXP Semiconductors