xe1202 ETC-unknow, xe1202 Datasheet - Page 18

• Manufacturer Part Number: xe1202
• Description: Low-power, Integrated Uhf Transceiver
• Manufacturer: ETC-unknow

5.2.5
In this register, users can store a reference pattern of 8, 16, 24, or 32 bits (see ADParam_Psize parameter). The
first byte of this pattern is always stored in the byte at address A[4:0] = 01000. If used, the 2
address A[4:0] = 01001, and so on. The MSB bit of the reference pattern is always the bit 7 of the address 01000
and the LSB bit is the bit 0 of the address 01000, 01001, 01010, or 01011 if the pattern length is 8, resp. 16, 24, or
32 bits. When compared to the demodulated bit stream, the last bit received is compared to the LSB bit in the
Pattern register. The “oldest” bit received (the first of the last 8, 16, 24, or 32 received bits, depending on
ADParam_Psize) is compared with the bit 7 of byte address 01000 (the MSB).
Example of pattern recognition with a 32-bit pattern
18
Pattern register
101
ADParam_WBBcond
ADParam_Regcond
Bit 7
ADParam_Res2
ADParam_Xsel
Byte Address
10010011
10010011
01000
Pattern
Name
Name
Bit 0
previous bits from
Bit 7
Bits
Bits
7-0
Byte Address
demodulator
3
2
1
0
10101010
10101010
01001
Bit 0
Byte Address
Byte Address
00111
00111
00111
00111
01000
01001
01010
01011
Bit 7
Byte Address
10010011
10010011
01010
Description
Regulation process of the bandwidth
of the base-band filter according to
the selected bandwidth:
0 -> regulation restarted each time
1 -> no regulation started when
Boosting process of the base-band
filter according to the selected
bandwidth:
0 -> boosting restarted each time
1 -> no boosting started when
Selection of the XOSC modes:
0 -> CL + C0 = 15 pF
1 -> CL + C0 = 11 pF, lower current
consumption mode
Reserved
Description
1
2
3
4
st
nd
rd
th
byte of the reference pattern
byte
byte
byte
the bandwidth is changed
bandwidth is changed
the bandwidth is changed
bandwidth is changed
Bit 0
Bit 7
last bit received
Byte Address
10101010
10101010
01011
Data Sheet
XE1202
nd
D0211-105
Bit 0
byte is stored at