NRF9E5 NORDIC SEMICONDUCTOR, NRF9E5 Datasheet - Page 44

• Manufacturer Part Number: NRF9E5
• Description: TRX, 430-928MHZ, MCU/ADC/PWM, SMD
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF9E5

• Receiving Current: 12.5mA
• Transmitting Current: 30mA
• Data Rate: 50Kbps
• Frequency Range: 430MHz To 928MHz
• Modulation Type: GFSK
• Rf Ic Case Style: QFN
• No. Of Pins: 32
• Supply Voltage Range: 1.9V To
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PRODUCT SPECIFICATION
nRF9E5 Single Chip Transceiver with Embedded Microcontroller and ADC
13 SPI
nRF9E5 SPI is a simple single buffered master. The 3 data lines of the SPI bus (MISO,
SCK and MOSI) are multiplexed (by writing to register SPI_CTRL) between the GPIO
pins (lower 3 bits of P1) and the RF transceiver and AD converter subsystems. The SPI
hardware does not generate any chip select signal. The bootstrap loader uses EECSN
(GPIO P0.3) as chip select for the boot EEPROM. On-chip GPIO P2.3 is dedicated as
chip select for the RF transceiver and AD converter subsystems. GPIO pins from port 0
may be used as chip selects for other external SPI slaves.
The SPI hardware is controlled by SFR’s SPI_DATA (0xb2), SPI_CTRL (0xb3) and
SPICLK (0xb4) as explained in Table 33 below.
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone [phone] - Fax [phone]
Revision: 1.3
Addr
SFR
(hex)
B2
B3
B4
R/W
R/W
R/W
R/W
#bit
8
2
4
Table 33 SPI control and data SFR-registers.
Init
(hex)
0
0
0
Name
SPI_DATA
SPI_CTRL
SPICLK
Page 44 of 108
Function
SPI data input/output
00 -> SPI not used no clock generated
01 -> SPI connected to port P1 (as for booting)
10 -> SPI connected to the nRF905 transceiver
Divider factor from CPU clock to SPI clock
0000: 1/2
0001: 1/2
0010: 1/4
0011: 1/8
0100: 1/16 of CPU clock frequency
0101: 1/32 of CPU clock frequency
0110: 1/64 of CPU clock frequency
other: 1/64 of CPU clock frequency
(see also Table 11 Port 1 (P1) functions)
(see Table 15 P2 (RADIO) register )
of CPU clock frequency
of CPU clock frequency
of CPU clock frequency
of CPU clock frequency
June 2006