PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Revision: 1.1 Page 25 of 40 March 2006
IMPORTANT TIMING DATA
The following timing applies for operation of nRF2401A.
nRF2401A Timing Information
nRF2401A timing Max. Min. Name
PWR_DWN Î Configuration mode 3ms Tpd2cfgm
PWR_DWNÎ Active mode (RX/TX) 3ms Tpd2a
ST_BY Î TX ShockBurst™
195µs
Tsby2txSB
ST_BY Î TX Direct Mode
202µs
Tsby2txDM
ST_BY Î RX mode
202µs
Tsby2rx
Minimum delay from CS to data.
5µs
Tcs2data
Minimum delay from CE to data.
5µs
Tce2data
Minimum delay from DR1/2 to clk. 50ns Tdr2clk
Maximum delay from clk to data. 50ns Tclk2data
Delay between edges 50ns Td
Setup time 500ns Ts
Hold time 500ns Th
Delay to finish internal GFSK data 1/data rate Tfd
Minimum input clock high 500ns Thmin
Set-up of data in Direct Mode 50ns Tsdm
Minimum clock high in Direct Mode 300ns Thdm
Minimum clock low in Direct Mode 230ns Tldm
Time on air, TX Direct mode 4ms ToaDM
Table 19 Operational timing of nRF2401A
When the nRF2401A is in power down it must always settle in stand by for 3ms
before it can enter configuration or one of the active modes.
PWR_UP
DATA
CE
Tpd2cfgm
CLK1
CS
Figure 12 Timing diagram for power down (or VDD off) to configuration mode
for nRF2401A.
