LMX2485 National Semiconductor Corporation, LMX2485 Datasheet - Page 30

• Manufacturer Part Number: LMX2485
• Description: 50 Mhz - 3.0 Ghz High Performance Delta-sigma Low Power Dual Pllatinum 50 Mhz - 3.0 Ghz High Performance Delta-sigma Low Power Dual Pllatinum? Frequency Synthesizers With 800 Mhz Integer Pll
• Manufacturer: National Semiconductor Corporation

www.national.com
Programming Description
This corresponds to the following bit settings.
Register
R4
R5
R6
R7
Bit Location
R4[17:16]
R4[15:14]
R5[23:14]
R6[23:22]
R6[21:18]
R5[13:4]
R6[17:4]
R4[7:4]
R4[23]
R4[12]
R4[11]
R4[10]
R7[13]
R4[9]
R4[8]
R7[7]
R7[6]
R7[5]
R7[4]
RF_FD[21:12]
RF_FN[21:12]
OSC_OUT
Bit Name
OSC_2X
RF_CPP
RF_TOC
RF_CPF
RF_RST
RF_CPT
IF_CPP
IF_RST
IF_CPT
ATPU
DITH
MUX
DIV4
IF_P
CSR
FM
(Continued)
Extended Fractional Denominator
Extended Fractional Numerator
Fastlock Charge Pump Current
RF Charge Pump Polarity
IF Charge Pump Polarity
Lock Detect Adjustment
RF PLL Counter Reset
IF PLL Counter Reset
Cycle Slip Reduction
RF Timeout Counter
OSCout Pin Enable
Oscillator Doubler
Modulation Order
IF PLL Prescaler
RF PLL Tri-State
Bit Description
Ftest/LD Output
IF PLL Tri-State
Autopowerup
Dithering
30
Bit Value
0
0
0
0
0
0
2
3
0
1
1
1
0
0
0
0
0
0
0
Disabled (Fcomp ≤ 20 MHz)
3rd Order
Bit State
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Positive
Positive
Strong
16/17