NRF905 NORDIC SEMICONDUCTOR, NRF905 Datasheet - Page 15

• 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 DEVICE CONFIGURATION
All configuration of the nRF905 is via the SPI interface. The interface consists of five
registers; a SPI instruction set is used to decide which operation shall be performed.
The SPI interface can be activated in any mode however Nordic Semiconductor ASA
recommends the chip be in standby or power down mode.
6.1
The SPI interface consists of five internal registers. A register read-back mode is
implemented to allow verification of the register contents.
Status – Register
Register contains status of Data Ready (DR) and Address Match (AM).
RF – Configuration Register
Register contains transceiver setup information such as frequency and output power
ext.
TX – Address
Register contains address of target device. How many bytes used is set in the
configuration register.
TX – Payload
Register containing the payload information to be sent in a ShockBurst
How many bytes used is set in the configuration register.
RX – Payload
Register containing the payload information derived from a received valid
ShockBurst
data in the RX-Payload register is indicated with a high Date Ready (DR) signal.
Main office: Nordic Semiconductor ASA
Revision: 1.4
SPI Register Configuration
TM
packet. How many bytes used is set in the configuration register. Valid
Figure 5 SPI – interface and the five internal registers.
MISO
MOSI
SCK
CSN
I/O-reg
- Vestre Rosten 81, N-7075 Tiller, Norway
Page 15 of 42
EN
DTA
CLK
EN
DTA
CLK
EN
DTA
CLK
EN
DTA
CLK
EN
DTA
CLK
RF - CONFIGURATION
STATUS-REGISTER
TX-PAYLOAD
RX-PAYLOAD
TX-ADDRESS
REGISTER
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TM
June 2006
packet.