NRF905 NORDIC SEMICONDUCTOR, NRF905 Datasheet - Page 16

• Manufacturer Part Number: NRF905
• Description: IC, TRANSCEIVER, 430 928MHZ, SMD
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF905

• Transmitting Current: 9mA
• Data Rate: 50Kbps
• Frequency Range: 430MHz To 928MHz
• Modulation Type: GFSK
• Sensitivity Dbm: -100dBm
• Rf Ic Case Style: QFN
• No. Of Pins: 32
• Supply Voltage Range: 1.9V To 3.6V
• Output Power: 10dBm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PRODUCT SPECIFICATION
nRF905 Single Chip 433/868/915 MHz Radio Transceiver
6.2
The available commands to be used on the SPI interface is shown below. Whenever
CSN is set low the interface expects an instruction. Every new instruction must be
started by a high to low transition on CSN.
Instruction Name
W_CONFIG
(WC)
R_CONFIG
(RC)
W_TX_PAYLOAD
(WTP)
R_TX_PAYLOAD
(RTP)
W_TX_ADDRESS
(WTA)
R_TX_ADDRESS
(RTA)
R_RX_PAYLOAD
(RRP)
CHANNEL_CONFIG
(CC)
STATUS REGISTER
A read or a write operation may operate on a single byte or on a set of succeeding
bytes from a given start address defined by the instruction. When accessing
succeeding bytes one will read or write MSB of the byte with the smallest byte
number first.
Main office: Nordic Semiconductor ASA
Revision: 1.4
SPI Instruction Set
Table 7 Instruction set for the nRF905 SPI interface.
Instruction set for the nRF905 SPI Serial Interface
Instruction
Format
0000 AAAA
0001 AAAA
0010 0000
0010 0001
0010 0010
0010 0011
0010 0100
1000 pphc
cccc cccc
N.A.
- Vestre Rosten 81, N-7075 Tiller, Norway
Operation
Write Configuration-register. AAAA indicates which byte
the write operation is to be started from. Number of bytes
depends on start address AAAA.
Read Configuration-register. AAAA indicates which byte
the read operation is to be started from. Number of bytes
depends on start address AAAA.
Write TX-payload: 1 – 32 bytes. A write operation will
always start at byte 0.
Read TX-payload: 1 – 32 bytes. A read operation will
always start at byte 0.
Write TX-address: 1 – 4 bytes. A write operation will
always start at byte 0.
Read TX-address: 1 – 4 bytes. A read operation will
always start at byte 0
Read RX-payload: 1 – 32 bytes. A read operation will
always start at byte 0.
Special command for fast setting of CH_NO,
HFREQ_PLL and PA_PWR in the CONFIGURATION
REGISTER. CH_NO= ccccccccc, HFREQ_PLL = h
PA_PWR = pp
The content of the status-register (S[7:0]) will always be
read to MISO after a high to low transition on CSN as
shown in Figure 6 and 7.
Page 16 of 42
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June 2006