nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 22

• Manufacturer Part Number: nRF24E1
• Description: 2.4Ghz RF Transceiver With Embedded 8051 Compatible Microcontroller And 9 Input, 10 Bit ADC
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
Figure 4-4 Flow Chart ShockBurst™ Transmit of nRF2401 subsystem
4.2.3.2 ShockBurst™ Transmit:
4.2.3.2.1 CPU interface pins: CE, CLK1, DATA
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
YES
1. When the application CPU has data to send, set CE high. This activates
2. The address of the receiving node (RX address) and payload data is
3. CPU sets CE low, this activates a ShockBurst™ transmission.
4. ShockBurst™:
(250 or 1000kbps)
Adding Preamble
Calculating CRC
and PAYLOAD
Loading ADDR
ShockBurst
ShockBurst
TX (CE=hi)?
RF2401 on-board data processing.
clocked into the nRF2401 subsystem. The application protocol or CPU sets
the speed <1Mbps (ex: 10kbps).
completed?
nRF2401 in
uController
CE=Low?
nRF2401
nRF2401
nRF2401
Package
Sending
Sending
data
YES
YES
TM
TM
RF front end is powered up
RF package is completed (preamble added, CRC calculated)
Data is transmitted at high speed (250 kbps or 1 Mbps configured
by user).
nRF2401 subsystem returns to stand-by when finished
NO
NO
NO
amble
Pre-
Data content of registers:
Input FIFO not Empty
ADDR
ADDR
ADDR
QhtrÃ!!ÂsÃ(&
Maximum 256 bits
PAYLOAD
PAYLOAD
PAYLOAD
CRC
CRC
July 2003