XE1202AI027TRLF Semtech, XE1202AI027TRLF Datasheet - Page 16

• Manufacturer Part Number: XE1202AI027TRLF
• Description: Narrow Band 433/868/915MHz RF Transceiver
• Manufacturer: Semtech

When the serial interface is not used for read or write operations, both SCK and SI should be set to “1”.
Note that except in read mode, SO is set to “0” and cannot be configured in a high-impedance mode.
5.2 Configuration and Status registers
XE1202A TrueRF™ has a series of configuration registers programmable through the serial control interface
described above. Their details are listed in Table 10 below. The size of these registers is 1, 2, 3, or 4 bytes. Their
byte address is a 5 bit address, A[4:0]. In addition, there is one register, DataOut, from which users can read
various transceiver status information.
All the bits that are referred to as “reserved” in this section should be set to “0” during write operations.
5.2.1
© Semtech 2006
RTParam configuration register
Name
RTParam
FSParam
DataOut
ADParam
Pattern
RTParam_Bits
RTParam_RSSI
RTParam_FEI
RTParam_Rmode
SC K
SC K
/EN
S O
S O
SI
SI
Name
ST AR T
ST AR T
Size
3 x 8 bit
1 x 8 bit
2 x 8 bit
6
Bits
7
5
4
2 x 8 bit
4 x 8 bit
Figure 8: Read sequence into configuration register
R/W
R/W
A(4)
A(4)
Table 10: Configuration registers
Byte Address
00000
00000
00000
00000
Byte Address
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
A(0)
A(0)
17
D(7)
D(7)
D(6)
D(6)
XE1202A TrueRF™
D(5)
D(5)
Description
Receiver modes:
0 -> A-mode (high sensitivity)
1 -> B-mode (high linearity)
Bit synchronizer on/off:
0 -> off; 1 -> on
RSSI on/off:
0 -> off; 1 -> on
FEI on/off:
0 -> off; 1 -> on
Description
Receiver
parameters registers
Frequency parameters
Transceiver data register
Additional parameters
Reference pattern for the “pattern
recognition” function
D(4)
D(4)
D(3)
D(3)
D(2)
D(2)
and
D(1)
D(1)
D(0)
D(0)
transmitter
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