nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 16

• 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
P1 may also be configured as a SPI master port , and is then controlled by the 3 SFR
registers 0xB2, 0xB3, 0xB4 as shown in the table below.
Table 3-6 : SPI control and data SFR-registers
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
B2
B3
B4
R/W
R/W
R/W
8
2
2
0
0
0
SPI_DATA SPI data input/output
SPI_CTRL
SPICLK
Qhtrà %ÂsÃ(&
00 -> SPI not used no clock generated
Divider factor from CPU clock to SPI clock
01 -> SPI connected to port P1 (as for booting)
10 -> SPI connected to RADIO
11 -> SPI connected to RADIO receiver 2 for RX
00: 1/8
01: 1/16 of CPU clock frequency
10: 1/32 of CPU clock frequency
11: 1/64 of CPU clock frequency
The CPU clock is the oscillator generated clock
described in Crystal Specification page 91
another GPIO must be used as chip select
(see also Table 3-4 : Port 1 (P1) functions)
transmitter/receiver 1 for TX or RX or for
transceiver configuration
Chip select is a bit of RADIO register (see
Table 4-2 : RADIO register )
of CPU clock frequency
July 2003