NRF2401 Datasheet, PDF (19/37 Pages) List of Unclassifed Manufacturers – Single chip 2.4 GHz Transceiver

PRODUCT SPECIFICATION
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The section B[119:16] contains the segments of the configuration register dedicated to
ShockBurst™ operational protocol. After VDD is turned on ShockBurst™
configuration is done once and remains set whilst VDD is present. During operation
only the first byte for frequency channel and RX/TX switching need to be changed.
3//B&75/
'
0
0
1
1
3//B&75/
'
3//
0
Open TX/Closed RX
1
Open TX/Open RX
0
Closed TX/Closed RX
1
Closed TX/Open RX
Table 10 PLL setting.
Bit 121-120:
PLL_CTRL: Controls the setting of the PLL for test purposes. With closed
PLL in TX no deviation will be present.
'$7$[B:
'$7$B:
119 118 117 116 115 114 113 112
'$7$B:
111 110 109 108 107 106 105 104
Table 11 Number of bits in payload.
Bit 119 – 112:
DATA2_W: Length of RF package payload section for receive-channel 2.
Bit 111 – 104:
DATA1_W: Length of RF package payload section for receive-channel 1.
NOTE:
The total number of bits in a ShockBurst™ RF package may not exceed 256!
Maximum length of payload section is hence given by:
'$7$[ _: (ELWV) = 256 − $''5 _: − &5&
Where:
ADDR_W: length of RX address set in configuration word B[23:18]
CRC: check sum, 8 or 16 bits set in configuration word B[17]
PRE: preamble, 4 or 8 bits are automatically included
Shorter address and CRC leaves more room for payload data in each package.
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Revision: 1.0
Page 19 of 37
March 2003