CC2550-RTY1 datasheet(30/62 Pages) TI2

30 / 62 page

CC2550

SWRS039B

Page 30 of 58

Output Power Programming

The RF output power level from the device has

two levels of programmability, as illustrated in

Figure 18.

The RF output power level from the device is

programmed through the PATABLE register.

•

If 2-FSK, GFSK or MSK modulation is

used

the

desired

output

power

programmed to index 0 in the PATABLE

FREND0.PA_POWER

value shall be set to 0

(reset default value).

•

If OOK modulation is used the desired

output power for the logic 0 and logic 1

power levels are programmed to index 0

and index 1 in the PATABLE register

respectively

(PATABLE(0)[7:0]

and

PATABLE(1)[7:0]

The

3-bit

FREND0.PA_POWER

value shall be set to

Table 20 contains recommended PATABLE

settings

for

various

output

levels

and

frequency bands. See Section 10.6 on page

17 for PATABLE programming details. The

SmartRF® Studio software [4] should be used

to obtain optimum PATABLE settings for

various output powers.

PATABLE

must be programmed in burst mode

if writing to other entries than PATABLE(0)

(OOK modulation). Note that all content of the

PATABLE

is lost when entering the SLEEP

state.

Figure 18: PA_POWER and PATABLE

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