LPC1850 datasheet(104/157 Pages) PHILIPS

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	157 Pages

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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LPC1850_30_20_10

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Preliminary data sheet

Rev. 3 — 6 December 2011

104 of 157

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 microcontroller

11.3 Crystal oscillator

[1]

Parameters are valid over operating temperature range unless otherwise specified.

[2]

Typical ratings are not guaranteed. The values listed are at room temperature (25

C), nominal supply

voltages.

[3]

Indicates RMS period jitter.

[4]

PLL-induced jitter is not included.

[5]

Select HF = 0 in the XTAL_OSC_CTRL register.

[6]

Select HF = 1 in the XTAL_OSC_CTRL register.

Table 11.

Dynamic characteristic: oscillator

Tamb = 40 C to +85 C; VDD(IO), VDD(REG)(3V3) over specified ranges.[1]

Symbol

Parameter

Conditions

Min

Typ[2]

Max

Unit

Low-frequency mode (1 MHz - 20 MHz)[5]

tjit(per)

period jitter time

5 MHz crystal

[3][4] -

13.2

10 MHz crystal

6.6

15 MHz crystal

4.8

High-frequency mode (20 MHZ - 25 MHz)[6]

tjit(per)

period jitter time

20 MHz crystal

[3][4] -4.3

25 MHz crystal

3.7

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