Data Sheet

Revision 2.0 Page 39 of 74
nRF24L01 Product Specification
Figure 14. Timing of Enhanced ShockBurst™ for one packet upload (2Mbps)
In Figure 14.
the transmission and acknowledgement of a packet are shown. The PRX device is turned into
RX mode (CE=1), and the PTX device is set to TX mode (CE=1 for minimum 10μs). After 130μs the trans-
mission starts and finishes after the elapse of T
OA
.
When the transmission ends the PTX device automatically switches to RX mode to wait for the ACK packet
from the PRX device. After the PTX device receives the ACK packet it responds with an interrupt to the
MCU. When the PRX device receives the packet it responds with an interrupt to the MCU.
Standby 1 PLL Lock TX Standby 1
PTX IRQ
PTX MODE
UL
PTX CE
PTX SPI
T
OA
130usT
UL
PLL Lock
TX
RX
PLL Lock PLL Lock PLL Lock
PRX MODE
PRX IRQ
PRX CE
RX
PRX SPI
T
ESB Cycle
RX
IRQ:
TX DS
T
IRQ
Standby 1
>10us
130us 130us 130usT
ACK
IRQ:RX DR/DL
T
IRQ