RFM23 Datasheet, PDF (136/152 Pages) –

RFM23
Register 6Dh. TX Power
Bit
D7
Name
Type
D6
D5
Reserved
R
D4
D3
D2
D1
D0
lna_sw
txpow[2:0]
R/W
R/W
Reset value = xxxx1000
Bit
Name
7:4
Reserved
3
lna_sw
2:0
txpow[2:0]
Function
Reserved.
LNA Switch Controller.
If set, lna_sw control from the digital will go high during TX modes, and low
during other times. If reset, the digital control signal is low at all times.
TX Output Power.
The output power is configurable from –8 dBm to +13 dBm in ~3 dBm steps.
txpow[2:0] = 111 corresponds to +13 dBm and 000 to –8 dBm.
Register 6Eh. TX Data Rate 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
txdr[15:8]
Type
R/W
Reset value = 00001010
Bit
Name
Data Rate Upper Byte.
7:0
txdr[15:8]
See formula above.
Function
The data rate can be calculated as: TX_DR = 10³ x txdr[15:0] / 2¹⁶ [kbps] (if address 70[5] = 0) or
The data rate can be calculated as: TX_DR = 10³ x txdr[15:0] / 2²¹ [kbps] (if address 70[5] = 1)
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