NRF2401AG Nordic VLSI, NRF2401AG Datasheet - Page 14

• Manufacturer Part Number: NRF2401AG
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
DuoCeiver™ Simultaneous Two Channel Receive Mode
In both ShockBurst™ & direct modes the nRF2401A can facilitate simultaneous
reception of two parallel independent frequency channels at the maximum data rate.
This means:
The nRF2401A DuoCeiver™ technology provides 2 separate dedicated data channels
for RX and replaces the need for two, stand alone receiver systems.
There is one absolute requirement for using the second data channel. For the
nRF2401A to be able to receive at the second data channel the frequency channel
must be 8MHz higher than the frequency of data channel 1. The nRF2401A must be
programmed to receive at the frequency of data channel 1. No time multiplexing is
used in nRF2401A to fulfill this function. In direct mode the MCU must be able to
handle two simultaneously incoming data packets if it is not multiplexing between the
two data channels. In ShockBurst™ it is possible for the MCU to clock out one data
channel at a time while data on the other data channel waits for MCU availability,
without any lost data packets, and by doing so reduce the needed performance of the
MCU.
Nordic Semiconductor ASA
Revision: 1.1
F
Figure 9 DuoCeiver
RF2
=F
• nRF2401A can receive data from two 1 Mbps transmitters (ex: nRF2401A
• The output from the two data channels is fed to two separate MCU
RF1
or nRF2402) 8 MHz (8 frequency channels) apart through one antenna
interface.
interfaces.
• Data channel 1: CLK1, DATA, and DR1
• Data channel 2: CLK2, DOUT2, and DR2
• DR1 and DR2 are available only in ShockBurst™.
+8MHz
F
Figure 8 Simultaneous 2 channel receive on nRF2401A
RF1
- Vestre Rosten 81, N-7075 Tiller, Norway
Tx/Rx
nRF2401A
TM
with two simultaneously independent receive channels.
DataSlicer
DataSlicer
Recovery,
Recovery,
Clock
Clock
Page 14 of 40
ADDR,
ADDR,
Check
Check
CRC
CRC
-
nRF2401A
nRF2401A
Tx/Rx
Tx/Rx
Phone [phone]
DR1
DATA
DR2
CLK1
CLK2
DOUT2
-
Fax [phone]
Data(F
Data(F
March 2006
RF1
RF2
)
)