User Manual

Revision 1.0 Page 58 of 78
nRF24L01+ Product Specification
ERX_P1 1 1 R/W Enable data pipe 1.
ERX_P0 0 1 R/W Enable data pipe 0.
03 SETUP_AW Setup of Address Widths
(common for all data pipes)
Reserved 7:2 000000 R/W Only '000000' allowed
AW 1:0 11 R/W RX/TX Address field width
'00' - Illegal
'01' - 3 bytes
'10' - 4 bytes
'11' – 5 bytes
LSByte is used if address width is below 5 bytes
04 SETUP_RETR Setup of Automatic Retransmission
ARD
a
7:4 0000 R/W Auto Retransmit Delay
‘0000’ – Wait 250µS
‘0001’ – Wait 500µS
‘0010’ – Wait 750µS
……..
‘1111’ – Wait 4000µS
(Delay defined from end of transmission to start of
next transmission)
b
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
CONT_WAVE 7 0 R/W Enables continuous carrier transmit when high.
Reserved 6 0 R/W Only '0' allowed
RF_DR_LOW 5 0 R/W Set RF Data Rate to 250kbps. See RF_DR_HIGH
for encoding.
PLL_LOCK 4 0 R/W Force PLL lock signal. Only used in test
RF_DR_HIGH 3 1 R/W Select between the high speed data rates. This bit
is don’t care if RF_DR_LOW is set.
Encoding:
[RF_DR_LOW, RF_DR_HIGH]:
‘00’ – 1Mbps
‘01’ – 2Mbps
‘10’ – 250kbps
‘11’ – Reserved
Address
(Hex)
Mnemonic Bit
Reset
Value
Type Description