nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 18

• 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
7: PWR_UP, power on radio
6: CE, Activate RX or TX mode
5: CLK2, clock for receiver 2 data out
4: Not used
3: CS, Chip select configuration mode
2: Not used
1: CLK1, clock for data input or receiver 1 data out CLK1
0: DATA, configuration or TX data input
Table 4-2 : RADIO register - SFR 0xA0, default initial data value is 0x80.
Note : Some of the pins are overridden when SPI_CTRL=1x, see Table 4-3 :
Transceiver SPI interface.
It is more convenient to use the built-in SPI interface to do the most common
transceiver operations as RF configuration and ShockBurst™ RX or TX. Please see
Table 3-6 : SPI control and data SFR-registers for use of SPI interface. The radio port
will be connected in different ways to the SPI hardware when SPI_CTRL is ‘1x’.
When SPI_CTRL is ‘0x’, all radio pins are connected directly to their respective port
pins.
SPI signal
CS
(active high)
SCK
SDI
SDO
ShockBurst™ data
ready
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
Table 4-3 : Transceiver SPI interface.
SPI_CTRL=10 (binary)
RADIO_wr.6 (CE) for ShockBurst™
RADIO_wr.3 (CS) for Configuration
nRF2401/CLK1
nRF2401/DATA
nRF2401/DATA
RADIO_rd.2 (DR1)
Qhtrà 'ÂsÃ(&
PWR_UP
CE
CLK2
CS
DATA
SPI_CTRL=11
RADIO_wr.6 (CE)
nRF2401/CLK2
nRF2401/DOUT2
not used
RADIO_rd.6
(DR2)
July 2003