CC1101
SWRS061H Page 59 of 98
24 Output Power Programming
The RF output power level from the device has
two levels of programmability as illustrated in
Figure 31. The special PATABLE register can
hold up to eight user selected output power
settings. The 3-bit FREND0.PA_POWER value
selects the PATABLE entry to use. This two-
level functionality provides flexible PA power
ramp up and ramp down at the start and end
of transmission when using 2-FSK, GFSK,
4-FSK, and MSK modulation as well as ASK
modulation shaping. All the PA power settings
in the PATABLE from index 0 up to the
FREND0.PA_POWER value are used.
The power ramping at the start and at the end
of a packet can be turned off by setting
FREND0.PA_POWER=0 and then program the
desired output power to index 0 in the
PATABLE.
If OOK modulation is used, the logic 0 and
logic 1 power levels shall be programmed to
index 0 and 1 respectively.
Table 39 contains recommended PATABLE
settings for various output levels and
frequency bands. DN013 [15] gives the
complete tables for the different frequency
bands using multi-layer inductors. Using PA
settings from 0x61 to 0x6F is not allowed.
Table 40 contains output power and current
consumption for default PATABLE setting
(0xC6).
See Section 10.6 for PATABLE programming
details. PATABLE must be programmed in
burst mode if you want to write to other entries
than PATABLE[0].
Table 37: Optimum PATABLE Settings for Various Output Power Levels and Frequency Bands
Using Wire-Wound Inductors in 868/915 MHz Frequency Bands
Current
Consumption,
Typ. [mA]
Current
Consumption,
Typ. [mA]
Note: All content of the PATABLE except
for the first byte (index 0) is lost when
entering the SLEEP state.
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