NRF905 NORDIC SEMICONDUCTOR, NRF905 Datasheet - Page 19

• 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
6.4
Main office: Nordic Semiconductor ASA
Revision: 1.4
Parameter
ADDRESS
RX_RED_
UP_CLK_
UP_CLK_
RX_AFW
TX_AFW
PA_PWR
RETRAN
HFREQ_
CRC_EN
CH_NO
RX_PW
TX_PW
AUTO_
MODE
FREQ
CRC_
PWR
XOF
RX_
PLL
EN
RF – Configuration Register Description
Bitwidth
32
9
1
2
1
1
3
3
6
6
2
1
3
1
1
Table 9 Configuration-register description.
Description
Sets center freq. together with HFREQ_PLL (default = 001101100
Sets PLL in 433 or 868/915 MHz mode (default = 0).
Output power (default = 00).
Reduces current in RX mode by 1.6mA. Sensitivity is reduced (default = 0).
Retransmit contents in TX register if TRX_CE and TXEN are high (default = 0).
RX-address width (default = 100).
TX-address width (default = 100).
RX-payload width (default = 100000).
TX-payload width (default = 100000).
RX address identity. Used bytes depend on RX_AFW (default = E7E7E7E7
Output clock frequency (default = 11).
Output clock enable (default = 1).
Crystal oscillator frequency. Must be set according to external crystal resonant-
frequency (default = 100).
CRC – check enable (default = 1).
CRC – mode (default = 1).
- Vestre Rosten 81, N-7075 Tiller, Norway
'0' – Chip operating in 433MHz band
'1' – Chip operating in 868 or 915 MHz band
'00' -10dBm
'01' -2dBm
'10' +6dBm
'11' +10dBm
'0' – Normal operation
'1' – Reduced power
'0' – No retransmission
'1' – Retransmission of data packet
'001' – 1 byte RX address field width
'100' – 4 byte RX address field width
'001' – 1 byte TX address field width
'100' – 4 byte TX address field width
'000001' – 1 byte RX payload field width
'000010' – 2 byte RX payload field width
'100000' – 32 byte RX payload field width
'000001' – 1 byte TX payload field width
'000010' – 2 byte TX payload field width
'100000' – 32 byte TX payload field width
'00' – 4MHz
'01' – 2MHz
'10' – 1MHz
'11' – 500kHz
'0' – No external clock signal available
'1' – External clock signal enabled
'000' – 4MHz
'001' – 8MHz
'010' – 12MHz
'011' – 16MHz
'100' – 20MHz
'0' – Disable
'1' – Enable
'0' – 8 CRC check bit
'1' – 16 CRC check bit
f
RF
.
.
= ( 422.4 + CH_NO
Page 19 of 42
d
/10)*(1+HFREQ_PLL
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= 108
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June 2006
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