LMX2330UTM datasheet(39/42 Pages) NSC

Part #	LMX2330UTM

Description	PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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39 / 42 page

2.0 Programming Description (Continued)

2.7.3 PRE RF

RF SYNTHESIZER PRESCALER SELECT

RF N[20]

The RF synthesizer utilizes a selectable dual modulus prescaler.

LMX2330U RF Synthesizer Prescaler Select

Control Bit

Description

Function

PRE RF

RF N[20]

RF Prescaler Select

32/33 Prescaler

Selected

64/65 Prescaler

Selected

LMX2331U and LMX2332U RF Synthesizer Prescaler Select

Control Bit

Description

Function

PRE RF

RF N[20]

RF Prescaler Select

64/65 Prescaler

Selected

128/129 Prescaler

Selected

2.7.4 PWDN RF

RF SYNTHESIZER POWERDOWN

RF N[21]

The PWDN RF bit is used to switch the RF PLL between a powered up and powered down mode.

Furthermore, the PWDN RF bit operates in conjuction with the TRI-STATE ID

o RF bit to set a synchronous or an asynchronous

powerdown mode.

Control Bit

Description

Function

PWDN RF

RF N[21]

RF Powerdown

RF PLL Active

RF PLL Powerdown

LMX2330UTM Datasheet(PDF) 39 Page - National Semiconductor (TI)

LMX2330UTM Datasheet(HTML) 39 Page - National Semiconductor (TI)

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