lmx2335u National Semiconductor Corporation, lmx2335u Datasheet - Page 42

• Manufacturer Part Number: lmx2335u
• Description: Pllatinum Ultra Low Power Dual Frequency Synthesizer For Rf Personal Communications
• Manufacturer: National Semiconductor Corporation

www.national.com
2.0 Programming Description
2.7.3 PRE RF1
The RF1 synthesizer utilizes a selectable dual modulus prescaler.
2.7.4 PWDN RF1
The PWDN RF1 bit is used to switch the RF1 PLL between a powered up and powered down mode.
Furthermore, the PWDN RF1 bit operates in conjuction with the TRI-STATE ID
powerdown mode.
PWDN RF1
Control Bit
Control Bit
PRE RF1
Register Location
Register Location
RF1 SYNTHESIZER PRESCALER SELECT
RF1 SYNTHESIZER POWERDOWN
RF1 N[20]
RF1 N[21]
(Continued)
RF1 Prescaler Select
RF1 Powerdown
Description
Description
42
o
RF1 bit to set a synchronous or an asynchronous
64/65 Prescaler
Selected
RF1 PLL Active
0
0
Function
Function
128/129 Prescaler
Selected
RF1 PLL Powerdown
RF1 N[21]
RF1 N[20]
1
1