User's Manual

 16MHz internal clock is started.
 RF packet is completed (see the packet description).
 Data is transmitted at high speed (1Mbps or 2Mbps configured by MCU).
5. If auto acknowledgement is activated (ENAA_P0=1) the radio goes into RX mode immediately,
unless the NO_ACK bit is set in the received packet. If a valid packet is received in the valid
acknowledgement time window, the transmission is considered a success. The TX_DS bit in the
STATUS register is set high and the payload is removed from TX FIFO. If a valid ACK packet is
not received in the specified time window, the payload is retransmitted (if auto retransmit is
enabled). If the auto retransmit counter (ARC_CNT) exceeds the programmed maximum limit
(ARC), the MAX_RT bit in the STATUS register is set high. The payload in TX FIFO is NOT
removed. The IRQ pin is active when MAX_RT or TX_DS is high. To turn off the IRQ pin, reset the
interrupt source by writing to the STATUS register (see Interrupt chapter). If no ACK packet is
received for a packet after the maximum number of retransmits, no further packets can be transmitted
before the MAX_RT interrupt is cleared. The packet loss counter (PLOS_CNT) is incremented
at each MAX_RT interrupt. That is, ARC_CNT counts the number of retransmits that were
required to get a single packet through. PLOS_CNT counts the number of packets that did not get
through after the maximum number of retransmits.
6. nRF24L01+ goes into standby-I mode if CE is low. Otherwise, next payload in TX FIFO is transmitted.
If TX FIFO is empty and CE is still high, nRF24L01+ enters standby-II mode.
7. If nRF24L01+ is in standby-II mode, it goes to standby-I mode immediately if CE is set low.
Constant carrier wave output for testing
The output power of a radio is a critical factor for achieving wanted range. Output power is also the first
test criteria needed to qualify for all telecommunication regulations.
Configuration
1. Set PWR_UP = 1 and PRIM_RX = 0 in the CONFIG register.
2. Wait 1.5ms PWR_UP->standby.
3. In the RF register set:
 CONT_WAVE = 1.
 PLL_LOCK = 1.
 RF_PWR.
4. Set the wanted RF channel.
5. Set CE high.
6. Keep CE high as long as the carrier is needed.
Note: Do not use REUSE_TX_PL together with CONT_WAVE=1. When both these registers are set
the chip does not react when setting CE low. If however, both registers are set PWR_UP = 0
will turn TX mode off. The nRF24L01+ should now output an unmodulated centered carrier.
REGULATORYINFORMATION
●ComplianceStatement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired
operation.