CC1050-RTR1 datasheet(19/40 Pages) TI1

19 / 40 page

CC1050

SWRS044

Page 19 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 single calibration

Frequency register A is calibrated first

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 = 0

Frequency register A and B are used for

two different channels

Write CAL:

CAL_START=1

The result of the calibration is stored for

frequency FREQ_A and can be read from

the status registers TEST0 and TEST2

when F_REG = 0

Write CURRENT:

VCO_CURRENT = Current

Write PA_POW = 00h

‘Current’ is the VCO current to be used

for both frequencies

PA is turned off to prevent spurious emission

Write CAL:

CAL_START=0

Wait for 26 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Frequency register B is calibrated second

Write MAIN: F_REG = 1

Write CAL:

CAL_START=1

Calibration time depend on the reference

frequency, see text.

The result of the calibration is stored for

frequency FREQ_B and can be read from

the status registers TEST0 and TEST2

when F_REG = 1

Write CAL:

CAL_START=0

End of calibration

Wait for maximum 26 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Start single calibration

Frequency register A is calibrated first

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 = 0

Frequency register A and B are used for

two different channels

Write CAL:

CAL_START=1

The result of the calibration is stored for

frequency FREQ_A and can be read from

the status registers TEST0 and TEST2

when F_REG = 0

Write CURRENT:

VCO_CURRENT = Current

Write PA_POW = 00h

‘Current’ is the VCO current to be used

for both frequencies

PA is turned off to prevent spurious emission

Write CAL:

CAL_START=0

Wait for 26 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Frequency register B is calibrated second

Write MAIN: F_REG = 1

Write CAL:

CAL_START=1

Calibration time depend on the reference

frequency, see text.

The result of the calibration is stored for

frequency FREQ_B and can be read from

the status registers TEST0 and TEST2

when F_REG = 1

Figure 11. Single calibration algorithm for two different frequencies

Not Recommended for New Designs

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