RF2958PCBA datasheet(15/20 Pages) RFMD

15 / 20 page

11-277

RF2958

Rev A0 050209

RF PLL Register 7 (RFPLL4)-Address 00111

Calibration Register 8 (CAL1)-Address 01000

TXRX Register 9 (TXRX1)-Address 01001

Location

Bit Name

Default

Function

RFPLL4(17)

Reserved

Reserved, program to zero (0)

RFPLL4(16:8)

DN(8:0)

145 h

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

DN=(deltaF/Fr)*256

RFPLL4(7:4)

CT_DEF(3:0)

RF VCO Coarse Tuning Value

RFPLL4(3:0)

KV_DEF(3:0)

RF VCO KV Calibration, default value

Location

Bit Name

Default

Function

CAL1(17:13)

TVCO(4:0)

0Fh

VCO1 Warm-up Time

TVCO1=(approximate warm-up time)x(Fr/32)

CAL1(12:8)

TLOCK(4:0)

07h

VCO1 Tuning Gain Calibration, approximate lock time

TLOCK1=(approximate lock time)x(Fr/128)

CAL1(7:3)

M_CT_VALUE

(4:0)

08h

VCO1 Coarse Tune Calibration Reference clock averaging time

M_CT_VALUE=(averaging time)x(Fr/32)

CAL1(2:0)

LD_WINDOW

(2:0)

Lock Detect Resolution 0 through 7

Location

Bit Name

Default

Function

TXRX1(17)

RXDCFBBYPS

Receiver DC Removal Loop

0=Enable DC Removal Loop

1=Disable DC Removal Loop

TXRX1(16:15)

PCONTROL

(1:0)

External TXVGC Controls VGA

Internal Control of VGA from Register TXVGC(4:0)

Internal Control of VGA from Power Control

TXRX1(14:10)

TXVGC(4:0)

00000

Transmit Variable Gain Select

0h-1Fh

High gain to low gain

TXRX1(9:7)

RXLPFBW

(2:0)

010

Receive Baseband Low Pass Filter Bandwidth Selection

000=Wide Bandwidth

111=Narrow Bandwidth

TXRX1(6:4)

TXLPFBW

(2:0)

010

Transmit Baseband Low Pass Filter Bandwidth Selection

000=Wide Bandwidth

111=Narrow Bandwidth

TXRX1(3)

TXDIFFMODE

Switches Between Single-Ended and Differential Mode

0=Single-ended mode

1=Differential mode

TXRX1(2)

TXENMODE

Input Buffer Enable TX

0=Input Buffer Controlled by TXEN

1=Input Buffer Controlled by BBEN

TXRX1(1)

INTBIASEN

Internal Bias Enable

0=Disabled - External Bias Required

1=Enabled - Internal Bias Enabled

TXRX1(0)

TXBYPASS

TX Baseband Filters Bypass

0=Not Bypassed

1=Bypassed

RF2958PCBA 数据表(PDF) 15 Page - RF Micro Devices

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