RF2958 RF Micro Devices, RF2958 Datasheet - Page 13

• Manufacturer Part Number: RF2958
• Description: 2.4GHz SPREAD-SPECTRUM TRANSCEIVER
• Manufacturer: RF Micro Devices

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REGISTER DETAILS
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
Rev A0 050209
CFG1(17:16)
CFG1(15:14)
IFPLL1(8:4)
IFPLL1(3:0)
IFPLL1(17)
IFPLL1(16)
IFPLL1(15)
IFPLL1(14)
IFPLL1(13)
IFPLL1(12)
IFPLL1(11)
IFPLL1(10)
Location
Location
IFPLL1(9)
CFG1(3)
CFG1(2)
CFG1(1)
CFG1(0)
REF_SEL(1:0)
HYBERNATE
AUTOCAL_
Bit Name
Bit Name
RF_VCO_
DAC1(3:0)
VTC_EN1
PLL_EN1
Reserved
IF_VCO_
REG_EN
REG_EN
IF_VGA_
REG_EN
reserved
KV_EN1
LD_EN1
PDP1
LPF1
CPL1
EN1
P1
Default
Default
00000
00
00
3h
0
1
1
1
0
0
1
0
0
1
0
0
0
Reserved, program to zero (0)
Reference Divider Value
0
0
1
1
Sleep Mode Current
0=nominal sleep mode current
1=very low sleep mode current
RF VCO Regulator Enable
0=disabled
1=enabled
IF VCO Regulator Enable
0=disabled
1=enabled
IF VGA Regulator Enable
0=disabled
1=enabled
IF PLL Enable
0=disabled
1=enabled
IF PLL KV Calibration Enable
0=disabled
1=enabled
IF PLL Coarse Tune Enable
0=VCO coarse tuning system is disabled
1=VCO coarse tuning system is enabled
IF PLL Loop Filter Bypass
0=Internal loop filter is used
1=Internal loop filter is bypassed and External loop filter is used
IF PLL Charge Pump Leakage Current
0=minimum value
1=2xminimum value
IF PLL Phase Detector Polarity
0=positive, VCO frequency increases with increasing tuning voltage
1=negative, VCO frequency decreases with increasing tuning voltage
IF PLL Auto Calibration Enable
0=disabled
1=enabled
IF PLL Lock Detect Enable
0=disabled
1=enabled
IF PLL Prescaler Modulus
0=4/5 Mode
1=8/9 Mode
Reserved, program to zero (0)
IF VCO Coarse Tuning Voltage
LPF_V1=int (coarse tuning voltage/V
0
1
0
1
Divide by 2
Divide by 3
Divide by 44
Divide by 1 (bypass)
Function
Function
DD
)x16
RF2958
1/2 high, 1/2 low
1/3 high, 2/3 low
1/44 high, 43/44 low
11-275