xe1205 Semtech Corporation, xe1205 Datasheet - Page 34

• Manufacturer Part Number: xe1205
• Description: Low-power, High Link Budget Integrated Uhf Transceiver
• Manufacturer: Semtech Corporation

7.2.7
Name
Osc
Clkout
Clkout_freq(2:0)
RESERVED
Resxosc
304 kbit/s_filter
RESERVED
© Semtech 2007
OSCParam configuration register (oscillator parameters)
Bits
7
6
5-3
2-0
7-4
3
2-0
Address RW
17
17
17
17
18
18
18
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Table 24: OSCParam configuration register
Description
Sources of reference frequency
0 -> internal quartz oscillator (for XTAL or TCXO)
1 -> external signal applied on pin XTA (CMOS type signal, external clock)
Enable clkout
0 -> no signal provided on pin CLKOUT
1 -> Signal at reference frequency divided by 2, 4, 8,16, 32 provided on
CLKOUT (19.5 MHz down to 1.22 MHz)
Frequency of signal provided on CLKOUT:
000 -> 1.22 MHz
001 -> 2.44 MHz
010 -> 4.87 MHz
011 -> 9.75 MHz
others -> 19.5 MHz
RESERVED
Select the value of the resistor placed between TKA and TKB in order to
use the transceiver with a crystal operating on its third overtone
0000 -> no resistor ( 3.8 M )
0001 -> 1.48 k
0010 -> 1.56 k
0011 -> 1.66 k
0100 -> 1.78 k
0101 -> 1.91 k
0110 -> 2.07 k
0111 -> 2.26 k
1000 -> 2.55 k
1001 -> 2.81 k
1010 -> 3.22 k
1011 -> 3.79 k
1100 -> 4.65 k
1101 -> 6.04 k
1110 -> 8.79 k
1111 -> 16.55 k
304.7 kbit/s Tx filter
0 -> disabled
1 -> enabled
RESERVED
34
XE1205
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