nRF24E2 Nordic VLSI, nRF24E2 Datasheet - Page 19

• Manufacturer Part Number: nRF24E2
• Description: Single Chip RF Transmitter + MCU + ADC NRF2402 2.4GHz RF Transmitter
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
Note : Some of the pins are overridden when SPI_CTRL=1x, see Table 4-3 :
Transmitter SPI interface.
It is more convenient to use the built-in SPI interface to do the most common
transmitter operations as RF configuration and ShockBurst™ 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
Figure 4-1 : Transmitter interface
During the period the internal reset is active (regardless of whether or not the clock is
running), the RADIO outputs that control the nRF2401 transmitter subsystem are
forced to their respective default values (RADIO.3=0 (CS), RADIO.6=0 (CE)
RADIO.7=1 (PWR_UP)). When program execution starts, these ports will remain at
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
Table 4-3 : Transmitter SPI interface.
SDI
--------------------------
bitno
7
6
5
4
3
2
1
0
PWR_UP
write
CLK1
DATA
CE
CS
SDO
SCK
SPI_CTRL=10 (binary)
RADIO_wr.6 (CE) for ShockBurst™
RADIO_wr.3 (CS) for Configuration
nRF2401/CLK1
not used
nRF2401/DATA
2
MUX
SPI_CTRL
2
Qhtrà (ÂsÃ(
MUX
PWR_UP
CE
CLK2
CS
CLK1
DATA
input
------------------------
DOUT2
output
DATA
CLK2
CLK1
DR2
DR1
August 2003