CC2431_07 Datasheet, PDF (10/14 Pages) Texas Instruments – System-on-Chip for 2.4 GHz ZigBee/ IEEE 802.15.4 with Location Engine

CC2431
results have been calculated or until a
reset.
Note that LOCENG.EN must be 1 during
operation of the Location Engine.
2.2 Location Engine Registers
This section describes the RF registers
associated with the Location Engine.
These registers are:
• LOCENG
Location Engine
control and status
• REFCOORD Reference
coordinates input
• MEASPARM Measured
parameters input
• LOCX
Location estimate
X coordinate
• LOCY
Location estimate
Y coordinate
• LOCMIN
estimate
Minimum function
The RF registers reside in XDATA memory
space. Table 3 gives an overview of
register addresses while the remaining
tables in this section describe each
register in detail. Refer also to section 1
for Register conventions.
For the remaining RF registers refer to the
CC2430 Data Sheet.
XDATA
Address
0xDF55
0xDF56
0xDF57
0xDF58
0xDF59
0xDF5A
0xDF60
0xDF61
Table 3 : Overview of Location Engine RF registers
Register name
Description
REFCOORD
MEASPARM
LOCENG
LOCX
LOCY
LOCMIN
CHVER
CHIPID
Reference coordinates input
Measured parameters input
Location Engine control and status
Location estimate X coordinate
Location estimate Y coordinate
Minimum function estimate
Chip Version
Chip Identification
Bit Name
7:0 REFCOORD
Bit Name
7:0 MEASPARM
Reset R/W Description
0
R/W Location Engine reference coordinate [x0, y0, x1, y1, … x7,
y7]
Table 4: Register REFCOORD (0xDF55)
Reset R/W Description
0
R/W Location Engine measured parameters of channel and
reference nodes [A, n, rssi0, rssi1, …, rssi7]
Table 5: Register MEASPARM (0xDF56)
CC2431 PRELIMINARY Datasheet (Rev. 1.01) SWRS034A
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