LMX2487E National Semiconductor Corporation, LMX2487E Datasheet - Page 30

• Manufacturer Part Number: LMX2487E
• Description: 7.5 Ghz High Performance Delta-sigma Low Power Dual Pllatinum? Frequency Synthesizers With 3.0 Ghz Integer Pll
• Manufacturer: National Semiconductor Corporation

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This corresponds to the following bit settings.
Register
R4
R5
R6
R7
Register
R4
R5
R6
R7
23 22 21 20 19 18 17 16 15 14 13 12 11 10
0
0
0
0
0
0
0
0
0
Bit Location
R4[17:16]
R4[15:16]
R5[23:14]
R6[23:22]
R6[21:18]
R5[13:4]
R6[17:4]
R4[7:4]
R4[23]
R4[23]
R4[23]
R4[23]
R4[23]
R4[23]
R7[13]
R7[7]
R7[6]
R7[5]
R7[4]
0
0
0
0
0
0
0
0
0
0
0
0
RF_FD[21:12]
RF_FN[21:12]
OSC_OUT
Bit Name
RF_TOC
OSC_2X
RF_CPP
RF_CPF
RF_RST
RF_CPT
0
0
0
IF_CPP
IF_RST
IF_CPT
ATPU
DITH
MUX
DIV4
IF_P
CSR
FM
R4 Must be programmed manually.
0
0
0
Data[19:0]
0
0
0
30
0
0
0
Extended Fractional
Extended Fractional
RF Timeout Counter
OSCout Pin Enable
Oscillator Doubler
RF Charge Pump
IF PLL Prescaler
RF PLL Tri-State
IF Charge Pump
Modulator Order
Fastlock Charge
RF PLL Counter
Bit Description
Ftest/LD Output
IF PLL Tri-State
IF PLL Counter
Pump Current
0
0
0
Autopowerup
Denominator
Lock Detect
Adjustment
Numerator
Cycle Slip
Reduction
Dithering
Polarity
Polarity
Reset
Reset
0
0
1
0
0
0
9
0
0
0
8
0
0
1
Bit Value
7
0
0
0
0
2
3
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
6
0
0
0
5
0
0
0
4
0
0
0
(Fcomp
C3 C2 C1 C0
3
1
1
1
3rd Order
Bit State
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Positive
Positive
Strong
16/17
2
0
1
1
≤
20 MHz)
1
1
0
1
0
1
1
1