RFM22
Register 52h. TX Ramp Control
Bit
D7
Reserved
R/w
D6
D5
D4
D3
D2
D1
D0
txramp[1:0]
R/w
txmod[2:0]
R/w
ldoramp[1:0]
Name
Type
R/w
Reset value = 00100000
Bit
Name
Function
Reserved
7
Reserved.
TX Modulation Delay.
The time delay between PA enable and the beginning of the TX modulation to
allow for PA ramp-up. It can be set from 0 μs to 28 μs in 4 μs steps. This also
works during PA ramp down.
txmod[2:0]
6:4
3:2
TX LDO Ramp Time.
The RF LDO is used to help ramp the PA to prevent VCO pulling and spectral
splatter.
ldoramp[1:0]
00:
5 μs
01: 10 μs
10: 15 μs
11: 20 μs
TX Ramp Time.
The PA is ramped up slowly to prevent VCO pulling and spectral splatter. This
register sets the time the PA is ramped up.
txramp[1:0]
1:0
00:
5 μs
01: 10 μs
10: 15 μs
11: 20 μs
118
Tel: +86-755-82973805
Fax: +86-755-82973550
E-mail: sales@hoperf.com
http://www.hoperf.com
HOPERF [ HOPERF ]
