NRF905 NORDIC SEMICONDUCTOR, NRF905 Datasheet - Page 9

• 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
5
The nRF905 has two active (RX/TX) modes and two power-saving modes
5.1
5.2
The nRF905 mode is decided by the settings of TRX_CE, TX_EN and PWR_UP.
5.3
The nRF905 uses the Nordic Semiconductor ASA ShockBurst™ feature.
ShockBurst
without the need of a costly, high-speed micro controller (MCU) for data
processing/clock recovery. By placing all high speed signal processing related to RF
protocol on-chip, the nRF905 offers the application micro controller a simple SPI
interface, the data rate is decided by the interface-speed the micro controller itself sets
up. By allowing the digital part of the application to run at low speed, while
maximizing the data rate on the RF link, the nRF905 ShockBurst™ mode reduces the
average current consumption in applications. In ShockBurst
(AM) and Data Ready (DR) notifies the MCU when a valid address and payload is
received respectively. In ShockBurst
preamble and CRC. Data Ready (DR) notifies the MCU that the transmission is
completed. All together, this means reduced memory demand in the MCU resulting in
a low cost MCU, as well as reduced software development time.
Main office: Nordic Semiconductor ASA
Revision: 1.4
MODES OF OPERATION
Active Modes
Power Saving Modes
nRF ShockBurst™ Mode
PWR_UP
TM
0
1
1
1
1
makes it possible to use the high data rate offered by the nRF905
ShockBurst™ RX
ShockBurst™ TX
Power down and SPI - programming
Standby and SPI - programming
TRX_CE
Table 6 nRF905 operational modes.
X
X
0
1
1
- Vestre Rosten 81, N-7075 Tiller, Norway
TX_EN
TM
X
X
Page 9 of 42
0
0
1
TX, the nRF905 automatically generates
Operating Mode
Power down and SPI – programming
Standby and SPI – programming
Read data from RX register
Radio Enabled - ShockBurstTM RX
Radio Enabled - ShockBurstTM TX
- Phone [phone] -Fax [phone]
TM
RX, Address Match
June 2006