CC1000-RTR1 datasheet(27/55 Pages) TI

27 / 55 page

CC1000

SWRS048A

Page 27 of 55

Write CAL:

CAL_START=0

End of calibration

Wait for maximum 34 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Start dual calibration

Either frequency register A or B is selected

Write MAIN:

RXTX = 0; F_REG = 0

RX_PD = 0; TX_PD = 1; 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

Write CAL: CAL_DUAL = 1

Frequency registers A and B are both used

for RX mode

Write CAL:

CAL_START=1

Dual calibration is performed.

Result is stored in TEST0 and TEST2,

for both frequency A and B registers

Write CURRENT= RX current

Write PLL= RX pll

Update CURRENT and PLL for RX mode

Calibration time depend on the reference

frequency, see text.

Write CAL:

CAL_START=0

End of calibration

Wait for maximum 34 ms, or

Read CAL and wait until

CAL_COMPLETE=1

Start dual calibration

Either frequency register A or B is selected

Write MAIN:

RXTX = 0; F_REG = 0

RX_PD = 0; TX_PD = 1; 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

Write CAL: CAL_DUAL = 1

Frequency registers A and B are both used

for RX mode

Write CAL:

CAL_START=1

Dual calibration is performed.

Result is stored in TEST0 and TEST2,

for both frequency A and B registers

Write CURRENT= RX current

Write PLL= RX pll

Update CURRENT and PLL for RX mode

Calibration time depend on the reference

frequency, see text.

Figure 17. Dual calibration algorithm for RX mode

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