XE1203SKC868XE2 Semtech, XE1203SKC868XE2 Datasheet - Page 27

• Manufacturer Part Number: XE1203SKC868XE2
• Description: KIT STARTER FOR XE1203 868MHZ
• Manufacturer: Semtech
• Series: TrueRF™r
• Type: Transceiver, ISMr

Specifications of XE1203SKC868XE2

• Frequency: 868MHz
• For Use With/related Products: XE1203 (868MHz)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.2.7
This register holds the user supplied reference pattern of 8, 16, 24, or 32 bits (see the ADParam_Psize parameter).
The first byte of this pattern is always stored in the byte at address A[4:0] = 10011. If used, the 2
address A[4:0] = 10100, the 3
The MSB bit of the reference pattern is always bit 7 of address 10011.
Comparing the demodulated data, the first bit received of the last word is compared with bit 7 (the MSB) of byte
address 10011. The last bit received is compared with bit 0 (the LSB) in the Pattern register.
Example of pattern recognition with a 32-bit pattern:
Example of pattern recognition with an 8-bit pattern:
© Semtech 2008
101
101
PATParam_Pattern
Bit 7
Bit 7
previous bits from
ADParam_Sync_loss
ADParam_Fix_bsync
Byte Address
Byte Address
demodulator
Pattern register
10010011
10010011
10010011
10010011
10011
10011
Name
Name
Bit 0
Bit 0
previous
demodulator
Figure 16: Example of pattern recognition with a 32-bit pattern
Figure 17: Example of pattern recognition with an 8-bit pattern
rd
byte at address A[4:0] = 10101, and finally the 4
Bit 7
Bit 7
Bits
7-0
6-0
Bit
last bit received
Byte Address
Byte Address
s
7
10101010
10101010
Xxxxxxxx
10100
10100
Table 16: ADParam Configuration Register
Table 17: PATParam Pattern Registers
Addres
10010
10010
bits
s
Bit 0
Bit 0
Byte Address
from
Description
bit synchronizer configuration:
0-> default configuration
1-> high-interference environment
Number of bits before sync loss detection for Barker decoding
algorithm
10011
10100
10101
10110
27
Bit 7
Bit 7
Byte Address
Byte Address
10010011
10010011
Xxxxxxxx
10101
10101
Description
1
2
3
4
st
nd
rd
th
byte of the reference pattern
byte
byte
byte
Bit 0
Bit 0
th
byte at address A[4:0] = 01011.
Bit 7
Bit 7
Byte Address
Byte Address
last bit received
10101010
10101010
Xxxxxxxx
XE1203F
nd
10110
10110
byte is stored at
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Bit 0
Bit 0