RF2958PCBA datasheet(14/20 Pages) RFMD

14 / 20 page

11-276

RF2958

Rev A0 050209

IF PLL Register 2 (IFPLL2)-Address 00010

IF PLL Register 3 (IFPLL3)-Address 00011

RF PLL Register 4 (RFPLL1)-Address 00100

RF PLL Register 5 (RFPLL2)-Address 00101

RF PLL Register 6 (RFPLL3)-Address 00110

Location

Bit Name

Default

Function

IFPLL2(17:16)

Reserved

Reserved, program to zero (0)

IFPLL2(15:0)

IF_N(15:0)

22h

IFPLL divide-by-N value

Location

Bit Name

Default

Function

IFPLL3(17)

Reserved

Reserved, program to zero (0)

IFPLL3(16:8)

DN1(16:8)

1FFh

IF VCO KV Calibration, delta N value (signed 2’s complement)

DeltaF=DN1/(Fr)

IFPLL3(7:4)

CT_DEF1(3:0)

IF VCO Coarse Tuning Value

IFPLL3(3:0)

KV_DEF1(3:0)

IF VCO KV Calibration, default value

Location

Bit Name

Default

Function

RFPLL1(17)

PLL_EN

RF PLL Enable

0=disabled

1=enabled

RFPLL1(16)

KV_EN

RF PLL KV Calibration Enable

0=disabled

1=enabled

RFPLL1(15)

VTC_EN

RF PLL Coarse Tune Enable

0=VCO coarse tuning system is disabled

1=VCO coarse tuning system is enabled

RFPLL1(14)

LPF

RF PLL Loop Filter Bypass

0=Internal loop filter is used

1=Internal loop filter is bypassed and External loop filter is used

RFPLL1(13)

CPL

RF PLL Charge Pump Leakage Current

0=minimum value

1=2xminimum value

RFPLL1(12)

PDP

RF PLL Phase Detector Polarity

0=positive, VCO frequency increases with increasing tuning voltage

1=negative, VCO frequency decreases with increasing tuning voltage

RFPLL1(11)

AUTOCAL_EN

RF PLL Auto Calibration Enable

0=disabled

1=enabled

RFPLL1(10)

LD_EN

RF PLL Lock Detect Enable

0=disabled

1=enabled

RFPLL1(9)

RF PLL Prescaler Modulus

0=8/9 Mode

1=8/10 Mode

RFPLL1(8:4)

Reserved

00000

Reserved, program to zero (0)

RFPLL1(3:0)

DAC(3:0)

RF VCO Coarse Tuning Voltage

LPF_V1=int (coarse tuning voltage/VDD)x16

Location

Bit Name

Default

Function

RFPLL2(17:6)

N2(11:0)

5Eh

RF PLL Divide By N Value

RFPLL2(5:0)

NUM2(23:18)

RF PLL Numerator Value

Location

Bit Name

Default

Function

RFPLL3(17:0)

NUM2(17:0)

RF PLL Numerator Value

RF2958PCBA 数据表(PDF) 14 Page - RF Micro Devices

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RF2958PCBA 数据表(PDF) 14 Page - RF Micro Devices

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