PRELIMINARY PRODUCT SPECIFICATION
nRF24L01 Single Chip 2.4 GHz Radio Transceiver
Address
(Hex)
Mnemonic
Bit
Reset
Value
Type Description
‘0000’ – Wait 250+86uS
‘0001’ – Wait 500+86uS
‘0010’ – Wait 750+86uS
……..
‘1111’ – Wait 4000+86uS
(Delay defined from end of transmission
to start of next transmission)
ARC
3:0
0011
R/W Auto Retransmit Count
‘0000’ –Re-Transmit disabled
‘0001’ – Up to 1 Re-Transmit
on fail of AA
……
‘1111’ – Up to 15 Re-Transmit
on fail of AA
05
06
RF_CH
Reserved
RF_CH
RF Channel
R/W Only '0' allowed
R/W Sets the frequency channel nRF24L01
operates on
7
6:0
0
0000010
RF_SETUP
Reserved
PLL_LOCK
RF_DR
RF Setup Register
R/W Only '000' allowed
R/W Force PLL lock signal
R/W Data Rate
7:5
4
3
000
0
1
‘0’ – 1 Mbps
‘1’ – 2 Mbps
RF_PWR
2:1
0
11
1
R/W Set RF output power in TX mode
'00' – -18 dBm
'01' – -12 dBm
'10' – -6 dBm
'11' – 0 dBm
LNA_HCURR
STATUS
R/W Setup LNA gain
07
Status Register (In parallel to the SPI
instruction word applied on the MOSI
pin, the STATUS register is shifted
serially out on the MISO pin)
Reserved
RX_DR
7
6
0
0
R/W Only '0' allowed
R/W Data Ready RX FIFO interrupt. Set high
when new data arrives RX FIFO13.
Write 1 to clear bit.
TX_DS
5
0
R/W Data Sent TX FIFO interrupt. Set high
when packet sent on TX. If AUTO_ACK
is activated, this bit will be set high only
when ACK is received.
Write 1 to clear bit.
MAX_RT
RX_P_NO
4
0
R/W Maximum number of TX retries interrupt
Write 1 to clear bit. If MAX_RT is
set it must be cleared to enable
further communication.
3:1
111
R
Data pipe number for the payload
available for reading from RX_FIFO
000-101: Data Pipe Number
110: Not Used
111: RX FIFO Empty
TX_FULL
0
0
R
TX FIFO full flag. 1: TX FIFO full. 0:
13 The Data Ready interrupt is set by a new packet arrival event. The procedure for handling this
interrupt should be: 1) read payload via SPI, 2) clear RX_DR interrupt, 3) read FIFO_STATUS to
check if there are more payloads available in RX FIFO, 4) if there are more data in RX FIFO, repeat
from 1).
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway
Revision: 1.1
-
Phone +4772898900
-
Fax +4772898989
November 2005
Page 22 of 38
ETC [ ETC ]
