Product Specs

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]
Page 27 of 38
Revision: 1.1
November 2005
IMPORTANT TIMING DATA
The following timing applies for operation of nRF24L01.
nRF24L01 Timing Information
nRF24L01 timing
Max.
Min.
Name
Power Down € Standby mode
1.5ms
Tpd2stby
Standby modes € TX/RX mode
130s
Tstby2a
Minimum CE high
10s
Thce
Delay from CE pos. edge to CSN low
4s
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
ESB cycle
PTX: CE
PTX: IRQ (TX_DS)
PTX: Mode
Antenna
PRX: CE
PRX: IRQ (RX_DR)
PRX: Mode
Packet:
A ddress : 5 bytes
CRC: 1 byte
Payload: 1 byte
Figure 11 Timing of Enhanced ShockBurst™ for one packet upload (2Mbps).
0us
250us
1
2
1 byte payload with ACK (339 us)
CE high minimum 10 us
2 us
STBY I
TX
RX
TX
Payload (33 us + 4 us /byte)
128 us
6 us
ACK (33 us)
1 0
6 us
SPI: IRQ Clear
128 us
STBY I
RX
TX
RX