RFM22
3.6.7. TX Data Rate Generator
The data rate is configurable between 1–128 kbps. For data rates below 30 kbps the‖txdtrtscale‖ bit in register 70h
should be set to 1. When higher data rates are used this bit should be set to 0.
The TX date rate is determined by the following formula:
txdr [15: 0]×1MHz
DR_ TX =
216+5×txdtrtscale
DR_ TX×216+5×txdtrtscale
1MHz
txdr [15: 0] =
The txdr register may be found in the following registers.
POR
Def.
Function/De
scription
D7
D6
D5
D4
D3
txdr[11] txdr[10]
txdr[3] txdr[2]
D2
D1
D0
Add R/W
R/W
0Ah
AAh
TX Data Rate 1 txdr[15]
TX Data Rate 0 txdr[7]
txdr[14]
txdr[6]
txdr[13]
txdr[5]
txdr[12]
txdr[4]
txdr[9]
txdr[1]
txdr[8]
txdr[0]
6E
R/W
6F
28
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