NRF2401AG Nordic VLSI, NRF2401AG Datasheet - Page 20

• Manufacturer Part Number: NRF2401AG
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
ShockBurst™ configuration:
The section bit[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.
PLL_CTRL
Bit 121-120:
DATAx_W
Bit 119 – 112:
Bit 111 – 104:
NOTE:
Shorter address and CRC leaves more room for payload data in each package.
Nordic Semiconductor ASA
Revision: 1.1
DATA2_W: Length of RF package payload section for receive-channel 2.
DATA1_W: Length of RF package payload section for receive-channel 1.
The total number of bits in a ShockBurst™ RF package may not exceed 256!
Maximum length of payload section is hence given by:
Where:
PLL_CTRL: Controls the setting of the PLL for test purposes. With closed
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, 8 bits are automatically included
119
111
- Vestre Rosten 81, N-7075 Tiller, Norway
PLL in TX no deviation will be present. For normal operational
mode these two bits must both be low.
DATAx
Table 11 Number of bits in payload.
118
110
D121
0
0
1
1
117
109
Table 10 PLL setting.
_
W
D120
(
PLL_CTRL
bits
Page 20 of 40
0
1
0
1
DATA2_W
DATA1_W
116
108
)
=
Closed TX/Closed RX
Open TX/Closed RX
Closed TX/Open RX
256
115
107
Open TX/Open RX
−
PLL
ADDR
114
106
-
Phone [phone]
113
105
_
W
−
112
104
CRC
-
Fax [phone]
March 2006