Datasheet

PRELIMINARY PRODUCT SPECIFICATION
nRF24L01 Single Chip 2.4 GHz Radio Transceiver
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.2 Page 28 of 39 March 2006
IMPORTANT TIMING DATA
The following timing applies for operation of nRF24L01.
nRF24L01 Timing Information
nRF24L01 timing Max. Min. Name
Power Down Î Standby mode 1.5ms Tpd2stby
Standby modes Î TX/RX mode
130µs
Tstby2a
Minimum CE high
10µs
Thce
Delay from CE pos. edge to CSN low
4µs
Tpece2csn
Table 13 Operational timing of nRF24L01
When the nRF24L01 is in power down it must always settle in Standby for 1.5ms
before it can enter one of the TX or RX modes. Note that the configuration word will
be lost if VDD is turned off and that the device then must be configured before going
to one of the TX or RX mode.
Enhanced ShockBurst™ timing
1 2
ACK (33 us)
Payload (33 us + 4 us/byte)
2 us
1 byte payload with ACK (339 us)
128 us
5 us
5 us
128 us
Pac ke t:
Address: 5 bytes
CRC: 1 byte
Payload: 1 byte
S PI: IRQ Cle ar
CE high minimum 10 us
TX TX STBY I
RXSTBY I
1 0
RX
RX
TX
0us 250us
ESB cycle
PTX: CE
PTX: IRQ (TX_DS)
PTX: Mode
Anten na
PRX: CE
PRX: IRQ (R X_D R )
PRX: Mode
Figure 11 Timing of Enhanced ShockBurst™ for one packet upload (2Mbps).