CC1000-RTR2 datasheet(26/55 Pages) TI

26 / 55 page

CC1000

SWRS048A

Page 26 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 single calibration

RX frequency register A is calibrated first

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>=9.6kBd then write TEST4: L2KIO=3Fh

Write CAL: CAL_DUAL = 0

Frequency register A is used for

RX mode, register B for TX

Write CAL:

CAL_START=1

Calibration is performed in RX mode,

Result is stored in TEST0 and TEST2,

RX register

Write CURRENT = RX current

Write PLL = RX pll

Update CURRENT and PLL for RX mode

Write CAL:

CAL_START=0

Wait for 34 ms, or

Read CAL and wait until

CAL_COMPLETE=1

TX frequency register B is calibrated second

Write MAIN:

RXTX = 1; F_REG = 1

RX_PD = 1; TX_PD = 0; FS_PD = 0

CORE_PD = 0; BIAS_PD = 0; RESET_N=1

Write CAL:

CAL_START=1

Calibration is performed in TX mode,

Result is stored in TEST0 and TEST2,

TX registers

Write CURRENT = TX current

Write PLL = TX pll

Write PA_POW = 00h

Update CURRENT and PLL for TX mode

PA is turned off to prevent spurious emission

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 single calibration

RX frequency register A is calibrated first

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>=9.6kBd then write TEST4: L2KIO=3Fh

Write CAL: CAL_DUAL = 0

Frequency register A is used for

RX mode, register B for TX

Write CAL:

CAL_START=1

Calibration is performed in RX mode,

Result is stored in TEST0 and TEST2,

RX register

Write CURRENT = RX current

Write PLL = RX pll

Update CURRENT and PLL for RX mode

Write CAL:

CAL_START=0

Wait for 34 ms, or

Read CAL and wait until

CAL_COMPLETE=1

TX frequency register B is calibrated second

Write MAIN:

RXTX = 1; F_REG = 1

RX_PD = 1; TX_PD = 0; FS_PD = 0

CORE_PD = 0; BIAS_PD = 0; RESET_N=1

Write CAL:

CAL_START=1

Calibration is performed in TX mode,

Result is stored in TEST0 and TEST2,

TX registers

Write CURRENT = TX current

Write PLL = TX pll

Write PA_POW = 00h

Update CURRENT and PLL for TX mode

PA is turned off to prevent spurious emission

Calibration time depend on the reference

frequency, see text.

Figure 16. Single calibration algorithm for RX and TX

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