RF2958PCBA datasheet(13/20 Pages) RFMD

13 / 20 page

11-275

RF2958

Rev A0 050209

The individual registers and bits are described below. A write instruction to address 11111 causes global reset. All pro-

gramming values are binary unless otherwise specified.

Configuration Register 1 (CFG1)-Address 00000

IF PLL Register 1 (IFPLL1)-Address 00001

Location

Bit Name

Default

Function

CFG1(17:16)

reserved

Reserved, program to zero (0)

CFG1(15:14)

REF_SEL(1:0)

Reference Divider Value

Divide by 2

1/2 high, 1/2 low

Divide by 3

1/3 high, 2/3 low

Divide by 44

1/44 high, 43/44 low

Divide by 1 (bypass)

CFG1(3)

HYBERNATE

Sleep Mode Current

0=nominal sleep mode current

1=very low sleep mode current

CFG1(2)

RF_VCO_

REG_EN

RF VCO Regulator Enable

0=disabled

1=enabled

CFG1(1)

IF_VCO_

REG_EN

IF VCO Regulator Enable

0=disabled

1=enabled

CFG1(0)

IF_VGA_

REG_EN

IF VGA Regulator Enable

0=disabled

1=enabled

Location

Bit Name

Default

Function

IFPLL1(17)

PLL_EN1

IF PLL Enable

0=disabled

1=enabled

IFPLL1(16)

KV_EN1

IF PLL KV Calibration Enable

0=disabled

1=enabled

IFPLL1(15)

VTC_EN1

IF PLL Coarse Tune Enable

0=VCO coarse tuning system is disabled

1=VCO coarse tuning system is enabled

IFPLL1(14)

LPF1

IF PLL Loop Filter Bypass

0=Internal loop filter is used

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

IFPLL1(13)

CPL1

IF PLL Charge Pump Leakage Current

0=minimum value

1=2xminimum value

IFPLL1(12)

PDP1

IF PLL Phase Detector Polarity

0=positive, VCO frequency increases with increasing tuning voltage

1=negative, VCO frequency decreases with increasing tuning voltage

IFPLL1(11)

AUTOCAL_

EN1

IF PLL Auto Calibration Enable

0=disabled

1=enabled

IFPLL1(10)

LD_EN1

IF PLL Lock Detect Enable

0=disabled

1=enabled

IFPLL1(9)

IF PLL Prescaler Modulus

0=4/5 Mode

1=8/9 Mode

IFPLL1(8:4)

Reserved

00000

Reserved, program to zero (0)

IFPLL1(3:0)

DAC1(3:0)

IF VCO Coarse Tuning Voltage

LPF_V1=int (coarse tuning voltage/VDD)x16

RF2958PCBA 数据表(PDF) 13 Page - RF Micro Devices

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