si4430 Silicon Laboratories, si4430 Datasheet - Page 113

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si4430

Manufacturer Part Number
si4430
Description
Si4430 Ism Transceiver
Manufacturer
Silicon Laboratories
Datasheet

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Register 34h. Preamble Length
Register 35h. Preamble Detection Control 1
Reset value = 00001000
Reset value = 00101010
Name
Name
Type
Type
Bit
Bit
7:0
7:3
2:0
Bit
Bit
rssi_offset[2:0] rssi_offset[2:0]
prealen[7:0]
preath[4:0]
Name
Name
D7
D7
Preamble Length.
The value in the prealen[8:0] register corresponds to the number of nibbles (4 bits) in the
packet. For example prealen[8:0] = ‘000001000’ corresponds to a preamble length of 32
bits (8 x 4bits) or 4 bytes. The maximum preamble length is prealen[8:0] = 111111111
which corresponds to a 255 bytes Preamble. Writing 0 will have the same result as if writ-
ing 1, which corresponds to one single nibble of preamble.
Number of nibbles processed during detection.
Value added as offset to RSSI calculation. Every increment in this register results in an
increment of +4 dB in the RSSI.
D6
D6
preath[4:0]
R/W
D5
D5
Preliminary Rev. 0.4
D4
D4
prealen[7:0]
R/W
Function
Function
D3
D3
D2
D2
rssi_offset[2:0]
R/W
D1
D1
Si4430
D0
D0
113

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