NRF24L01P-R datasheet(76/78 Pages) NORDIC

76 / 78 page

Revision 1.0

Page 76 of 78

nRF24L01+ Product Specification

Enhanced ShockBurst™ receive payload

Select RX by setting the PRIM_RX bit in the CONFIG register to high. All data pipes that receive

data must be enabled (EN_RXADDR register), enable auto acknowledgement for all pipes running

Enhanced ShockBurst™ (EN_AA register), and set the correct payload widths (RX_PW_Px regis-

ters). Set up addresses as described in item 2 in the Enhanced ShockBurst™ transmitting pay-

load example above.

Start Active RX mode by setting CE high.

After 130µs nRF24L01+ monitors the air for incoming communication.

When a valid packet is received (matching address and correct CRC), the payload is stored in the

RX-FIFO, and the RX_DR bit in STATUS register is set high. The IRQ pin is active when RX_DR is

high. RX_P_NO in STATUS register indicates what data pipe the payload has been received in.

If auto acknowledgement is enabled, an ACK packet is transmitted back, unless the NO_ACK bit

is set in the received packet. If there is a payload in the TX_PLD FIFO, this payload is added to

the ACK packet.

MCU sets the CE pin low to enter standby-I mode (low current mode).

MCU can clock out the payload data at a suitable rate through the SPI.

nRF24L01+ is now ready for entering TX or RX mode or power down mode.

NRF24L01P-R Datasheet(PDF) 76 Page - Nordic Semiconductor