CC1050-RTR1 datasheet(20/43 Pages) TI2

20 / 43 page

CC1050

SWRS044

Page 20 of 40

Write CAL:

CAL_START=0

End of calibration

Wait for maximum 26 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Start dual calibration

Either frequency register A or B is selected

Write MAIN:

F_REG = 0

TX_PD = 0; FS_PD = 0

CORE_PD = 0; BIAS_PD = 0; RESET_N=1

Write FREQ_A, FREQ_B

If DR>=38kBd then {write TEST4: L2KIO=3Fh,

PRESCALER = 04h}

Write CAL: CAL_DUAL = 1

Frequency registers A and B are both used

Write CAL:

CAL_START=1

The result of the calibration is stored for

Both frequency FREQ_A and FREQ_B, and

can be read from the status registers TEST0

and TEST2

Write CURRENT:

VCO_CURRENT = Current

Write PA_POW = 00h

‘Current’ is the VCO current to be

used for both frequencies

Calibration time depend on the reference

frequency, see text.

Write CAL:

CAL_START=0

End of calibration

Wait for maximum 26 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Start dual calibration

Either frequency register A or B is selected

Write MAIN:

F_REG = 0

TX_PD = 0; FS_PD = 0

CORE_PD = 0; BIAS_PD = 0; RESET_N=1

Write FREQ_A, FREQ_B

If DR>=38kBd then {write TEST4: L2KIO=3Fh,

PRESCALER = 04h}

Write CAL: CAL_DUAL = 1

Frequency registers A and B are both used

Write CAL:

CAL_START=1

The result of the calibration is stored for

Both frequency FREQ_A and FREQ_B, and

can be read from the status registers TEST0

and TEST2

Write CURRENT:

VCO_CURRENT = Current

Write PA_POW = 00h

‘Current’ is the VCO current to be

used for both frequencies

Calibration time depend on the reference

frequency, see text.

Figure 12. Dual calibration algorithm

Not Recommended for New Designs

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