CC2431 Datasheet, PDF (11/16 Pages) Texas Instruments – System-on-Chip for 2.4 GHz ZigBee-TM / IEEE 802.15.4 with Location Engine

XDATA Address
0xDF55
0xDF56
0xDF57
0xDF58
0xDF59
0xDF60
0xDF61
Table 3 : Overview of Location Engine RF registers
Register name
REFCOORD
MEASPARM
LOCENG
LOCX
LOCY
CHVER
CHIPID
Description
Reference coordinates input
Measured parameters input
Location Engine control and status
Location estimate X coordinate
Location estimate Y coordinate
Chip Version
Chip Identification
CC2431
REFCOORD (0xDF55)
Bit Name
7:0 REFCOORD
MEASPARM (0xDF56)
Bit Name
7:0 MEASPARM
LOCENG (0xDF57)
Bit Name
7:5 -
4
EN
3
DONE
2
PARLD
1
REFLD
0
RUN
LOCX (0xDF58)
Bit Name
7:0 LOCX
Reset
0
R/W
R/W
Description
Location Engine reference coordinate [x0, y0, x1, y1, …
x15, y15]
Reset
0
R/W
R/W
Description
Location Engine measured parameters of channel and
reference nodes
[A, n, x_min, x_delta, y_min, y_delta, rssi₀, rssi₁, …, rssi₁₅]
Reset
00
0
0
0
0
0
R/W Description
R0
R/W
R
R/W
R/W
R0W1
Reserved, read as 0.
Enable location engine
0 Disable location engine
1 Enable location engine
Estimation completed. After 1 has been written to RUN, this
bit is cleared and then set to 1 when the estimated data is
ready.
Load parameters. This bit shall be written as 1 before the
set of parameters are written to MEASPARM. Write 0 to this
bit after the last parameter has been written.
Load reference coordinates. This bit shall be written as 1
before the set of coordinates are written to REFCOORD.
Write 0 to this bit after the last coordinate has been written.
Location estimate start. This bit shall be written as 1 when
desired coordinates and parameters have been written to
REFCOORD and MEASPARM registers. Estimation
process starts when 1 is written to this bit. Always read as
0.
Reset
00h
R/W
R
Description
Location estimate X coordinate with offset.
CC2431 Data Sheet (Rev. 2.01) SWRS034B
Page 11 of 15