NRF24L01G NORDIC SEMICONDUCTOR, NRF24L01G Datasheet - Page 43

• Manufacturer Part Number: NRF24L01G
• Description: IC, RF TRANSCEIVER, 2.4-2.4835GHZ QFN-20
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF24L01G

• Transmitting Current: 11.3mA
• Data Rate: 2Mbps
• Frequency Range: 2.4GHz To 2.4835GHz
• Modulation Type: GFSK
• Sensitivity Dbm: -82dBm
• Rf Ic Case Style: QFN
• No. Of Pins: 20
• Sensitivity (dbm): -82dBm
• Supply Voltage Range: 1.9V To 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

nRF24L01 Product Specification
7.9.6
In
the RX_DR IRQ is asserted immediately. The retransmission of the packet (PID=1) results in a discarded
packet. For the PTX both the TX_DS and RX_DR IRQ are asserted after the second transmission of ACK,
which is received. After the second packet (PID=2) is received on the PRX both the RX_DR (PID=2) and
TX_DS (ACK1PAY) IRQ is asserted. The callouts explains the different events and interrupts.
7.9.7
If the auto retransmit counter (ARC_CNT) exceeds the programmed maximum limit (ARC), the MAX_RT IRQ
is asserted. In
NOT removed and the MCU decides the next step in the protocol. A toggle of the CE starts a new
sequence of transmitting the same packet. The payload can be removed from the TX FIFO using the
FLUSH_TX command.
Revision 2.0
Figure 21. TX/RX cycles with ACK Payload and the according interrupts when the transmission fails. ARC
Figure 20.
Figure 20. TX/RX cycles with ACK Payload and the according interrupts when the ACK packet fails
PRX
MCU PRX
MCU PTX
PTX
PRX
MCU PRX
MCU PTX
PTX
1 Radio Turn Around Delay
2 Uploading Paylod for Ack Packet
3 Delay defined by MCU on PTX side, ≥ 130us
1 Radio Turn Around Delay
2 Uploading Paylod for Ack Packet
3 Delay defined by MCU on PTX side, ≥ 130us
Two transactions with ACK payload packet and the first ACK packet lost.
Two transactions where max retransmissions is reached
the ACK packet is lost and a retransmission is needed before the TX_DS IRQ is asserted, but
UL1
Figure 21.
Packet received.
IRQ: RX DR (PID=1)
UL1
UL
2
RX
TX:PID=1
Packet received.
IRQ: RX DR (PID=1)
UL
No address detected.
RX off to save current
2
the packet transmission ends with a MAX_RT IRQ. The payload in TX FIFO is
130us
No address detected.
RX off to save current
DL
TX:PID=1
UL2
1
RX
RX
ARD
ACK1 PAY
Auto retransmit delay
elapsed
130us
ACK PID=1 lost
during transmission
DL
130us
1
UL2
RX
ACK1 PAY
ARD
2
1
Auto retransmit delay
elapsed
Retransmit of packet
PID=1
ACK PID=1 lost
during transmission
TX:PID=1
Packet detected as
copy of previous,
discarded
RX
130us
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is set to 2.
1
TX:PID=1
130us
UL3
ACK received
IRQ: TX DS (PID=1)
Retransmit of packet
PID=1
1
RX DR (ACK1PAY)
ACK1 PAY
130us
ACK PID=1 lost
during transmission
RX
1
≥
RX
ARD
130us
IRQ
DL
Packet received.
IRQ: RX DR (PID=2)
RX
3
TX DS (ACK1PAY)
No address detected.
RX off to save current
≥
TX:PID=2
130us
RX
Packet detected as
copy of previous,
discarded
3
TX:PID=1
130us
IRQ
DL
ACK received
IRQ: TX DS (PID=2)
No address detected.
RX off to save current.
IRQ:MAX_RT reached
130us
1
RX DR (ACK2PAY)
ACK2 PAY
RX
1
RX
ACK1 PAY
≥
130us
IRQ
Packet received.
IRQ: RX DR (PID=3)
3
TX DS (ACK2PAY)
130us
ACK PID=1 lost
during transmission
TX:PID=3
1
RX
RX