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Texas Instruments CC2500 User Manual

Texas Instruments CC2500
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CC2500
S
WRS040
C
Page
79
of
89
0x22: FREND0
Front E
nd TX configuration
Bit
Field Name
Reset
R/W
Description
7:6
Reserved
R0
5:4
LODIV_BUF_CURRENT_TX[1:0]
1 (01)
R/W
Adjusts current TX LO buffer (input to PA). The value to use in
this field is given by the
SmartRF
Stu
dio software
[5]
.
3
Reserved
R0
2:0
PA_POWER[2:0]
0 (000)
R/W
Selects PA power setting. This value is an index to the
PATABLE
.
In OOK mode, this selects the PATABLE index to
use when transmitting a ‘1’. PATA
BLE index zero is used in
OOK when transmitting a ‘0’.
0x23: FSCAL3
Frequency
S
ynthesizer
C
alibration
Bit
Field Name
Reset
R/W
Description
7:6
FSCAL3[7:6]
2 (10)
R/W
Frequency synthesizer calibration configuration
.
The value to write in
this registe
r before calibration is given by the
SmartRF
Studio
software
[5]
.
5:4
CHP_CURR_CAL_EN[1:0]
2 (10)
R/W
Disable charge pump calibration stage when 0
3:0
FSCAL3[3:0]
9
(1001)
R/W
Frequency synthesizer calibratio
n result register.
Digital bit vector
defining the charge pump output current, on an exponential scale:
IOUT=I
0
·2
FSCAL3[3:0]/4
Fast frequency hopping without calibration for each hop can be done
by calibrating upfront for each frequency and saving the resu
lting
FSCAL3, FSCAL2 and FSCAL1 register values. Between each
frequency hop, calibration can be replaced by writing the FSCAL3,
FSCAL2 and FSCAL1 register values corresponding to the next RF
frequency.
0x24: FSCAL2
Frequency Synthesizer Calibration
Bit
Field Name
Reset
R/W
Description
7:6
Reserved
R0
5
VCO_CORE_H_EN
0
R/W
Choose high
(1)
/
low
(0)
VCO
4:0
FSCAL2[4:0]
10
(0x0A)
R/W
Frequency synthesizer calibration result register. VCO c
urrent
calibration result and override value
Fast frequency ho
pping without calibration for each hop can be done
by calibrating upfront for each frequency and saving the resulting
FSCAL3, FSCAL2 and FSCAL1 register values. Between each
frequency hop, calibration can be replaced by writing the FSCAL3,
FSCAL2 and FSCAL
1 register values corresponding to the next RF
frequency.

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Texas Instruments CC2500 Specifications

General IconGeneral
BrandTexas Instruments
ModelCC2500
CategoryTransceiver
LanguageEnglish

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