Product Specs

PRELIMINARY PRODUCT SPECIFICATION
nRF24L01 Single Chip 2.4 GHz Radio Transceiver
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Page 22 of 38
Revision: 1.1
November 2005
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
RF_CH
RF Channel
Reserved
7
0
R/W
Only '0' allowed
RF_CH
6:0
0000010
R/W
Sets the frequency channel nRF24L01
operates on
06
RF_SETUP
RF Setup Register
Reserved
7:5
000
R/W
Only '000' allowed
PLL_LOCK
4
0
R/W
Force PLL lock signal
RF_DR
3
1
R/W
Data Rate
‘0’ – 1 Mbps
‘1’ – 2 Mbps
RF_PWR
2:1
11
R/W
Set RF output power in TX mode
'00' – -18 dBm
'01' – -12 dBm
'10' – -6 dBm
'11' – 0 dBm
LNA_HCURR
0
1
R/W
Setup LNA gain
07
STATUS
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
7
0
R/W
Only '0' allowed
RX_DR
6
0
R/W
Data Ready RX FIFO interrupt. Set high
when new data arrives RX FIFO
13
.
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
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.
RX_P_NO
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).