xe1205 Semtech Corporation, xe1205 Datasheet - Page 29

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

7.2.2
The detailed description of the MCParam register is given in Table 17.
Name
Chip_mode(1:0)
Select_mode
Buffered_mode
Data_unidir
Band(1:0)
Freq_dev(8)
Freq_dev(7:0)
Knx
Br(6:0)
© Semtech 2007
MCParam configuration register (main configuration parameters)
Bits
7-6
5
4
3
2-1
0
7-0
7
6-0
Address RW
0
0
0
0
0
0
1
2
2
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Description
Transceiver mode:
00 -> sleep mode
01 -> receive mode
10 -> transmit mode
11 -> stand-by mode
Transceiver mode selection:
0 -> mode defined by MCParam_chip_mode, SW(1:0) is an output
1 -> mode defined by SW(1:0) :
Enable buffered mode:
0 -> continuous mode
1 -> buffered mode
Configure DATA pin
0 -> DATA is a bidirectional pin:
1 -> DATA is an output pin:
Frequency band:
01 -> 433
10 -> 863
11 -> 902
Frequency deviation MSB
Frequency deviation:
Df = int(Freq_dev(8:0)) * FSTEP
Where int(x) = integer value of the binary representation of x
Example
000000001 -> Df = FSTEP
111111111 -> Df = 511*FSTEP
all these frequency deviations are available if the data shaping filter is
disabled (please refer to Table 11)
Konnex mode enable
0 -> default mode -> bit rate defined by MCParam_Br(6:0)
1 -> Konnex mode-> bit rate = 32.7 kbit/s
Bit rate
Br = 152.34e3/(int(Br) + 1)
Where int(x) = integer value of the binary representation of x.
Example:
0000001 -> Br = 76.1 kbit/s
1111111 -> Br = 1.19 kbit/s
Note: if Konnex mode is enabled, then bit rate = 32.7 kbit/s.
sleep mode
receiver mode
transmitter mode -> SW(1:0) = 10
stand-by mode
SW(1:0) = 00 -> sleep mode
SW(1:0) = 01 -> receive mode
SW(1:0) = 10 -> transmit mode
SW(1:0) = 11 -> stand-by mode
input in transmit, output in receive mode
output in receive mode, high-impedance in transmit mode
435 MHz
870 MHz
928 MHz
29
-> SW(1:0) = 00
-> SW(1:0) = 01
-> SW(1:0) = 00
XE1205
www.semtech.com