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XE1205
Name
Bits
Address
RW
Description
(about 400 kHz SSB) and disables calibration:
0 -> bandwidth defined by BW(1:0)
1 -> bandwidth forced to its maximal value
Reg_BW(1:0)
3-2
8
r/w
Calibration of the bandwidth of the base band filter:
00 -> calibration at start up
01 -> no calibration
10 -> calibration when the bandwidth of the base band filter changes
11 -> calibration is forced each time 11 is written
Init_filter(1:0)
1-0
8
r/w
Base band filter initialization:
00 -> default initialize at start up
01 -> RESERVED
10 -> initialize each time the bandwidth change
11 -> force re-initialization
RSSI
7
9
r/w
RSSI off/on:
0 -> off
1 -> on
RSSI_range
6
9
r/w
Range of the RSSI:
0 -> low range
1 -> high range
RSSI_out
5-4
9
r
00 -> input power ≤ VTHR1
01 -> VTHR1 ≤ input power ≤ VTHR2
10 -> VTHR2 ≤ input power ≤ VTHR3
11 -> VTHR3 ≤ input power
FEI
3
9
r/w
Frequency Error Indicator off/on:
0 -> off
1 -> on
AFC_start
2
9
r/w
0 -> AFC not running process
1 -> AFC running
Writing 0 will start the AFC process. At the end of the AFC process, the
bit goes automatically back low.
AFC_OK
1
9
r/w
Result of the AFC
0 -> AFC operation successful
1 -> AFC operation unsuccessful
AFC_disable
0
9
r/w
Disabling the AFC
0 -> the error cancelation is automatically applied on the LO frequency
1 -> the error cancelation is not applied on the LO frequency
AFC_overflow
7
10
r/w
AFC overflow indicator
0 -> no overflow
1 -> the integrator of the frequency error is too high
writing 1 to this bit will reset the integrator
IQAMP
6
10
r/w
IQ amplifier off/on:
0 -> off
1 -> on
Rmode
5
10
r/w
Linearity/sensitivity mode
0 -> Mode A (high sensitivity)
1 -> Mode B (high linearity)
Pattern
4
10
r/w
Pattern recognition off/on:
0 -> off
1 -> on
Psize(1:0)
3-2
10
r/w
Size of the reference Pattern:
00 -> 8 bits
01 -> 16 bits
10 -> 24 bits
11 -> 32 bits
? Semtech 2008
32
www.semtech.com
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