TDA18211HD datasheet(34/66 Pages) NXP

34 / 66 page

TDA18211HD_5

Product data sheet

Rev. 05 — 2 June 2009

34 of 66

NXP Semiconductors

TDA18211HD

DVB-T Silicon Tuner IC

Fig 14. Flowchart TDA18211CalibrateRF

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CAL_MODE = 0

SM_LT = 1

AGC1_GAIN = 3h

EP4

EB18

Actions

Normal mode

Switch OFF AGC1

Set AGC1_GAIN to 15 dB

BP_FILTER = BP_FILTER

GAIN_TAPER = GAIN_TAPER

RF_BAND = RF_BAND

RFC_K = RFC_K, RFC_M = RFC_M

Frequency dependent parameters update

Find BP_FILTER = fRF(max) in BP_FILTER_map

Find GAIN_TAPER = fRF(max) in GAIN_TAPER_map

Find RF_BAND = fRF(max) in RF_BAND_map

Find RFC_K, RFC_M = fRF(max) in KM_map

Internal table

I2C-bus

RFC_CPROG

BP_FILTER_map

KM_map

GAIN_TAPER_map

freq_input

freq_input + 1 MHz

EP1 … EP2, EB13

Tuner registers update

EP4 … EP5

Tuner registers update

Set the internal calibration signal

Call TDA18211CalcCALPLL

Normal operation for the MAIN PLL charge pump

Normal operation for the CAL PLL charge pump

Get the calibration result

Call TDA18211ReadExtended

LO_FORCESRCE = 0

CAL_FORCESRCE = 0

Downconvert the calibration signal to 1 MHz

Call TDA18211CalcMAINPLL

Wait 5 ms

Wait 10 ms - PLLs locking

Internal synchronization

EP2, EP1, EP2, EP1

EB4

EB7

Launch the RF Tracking filters calibration

FORCE_LOCK = 1

Wait 60 ms - calibration on going

EB20

Normal mode

Switch ON AGC1

Set AGC1_GAIN to 6 dB

CAL_MODE = 0

SM_LT = 0

AGC1_GAIN = 0

Tuner registers update

Synchronization

EB18

EP3 ... 4

EP1

LO_FORCESRCE = 1

CAL_FORCESRCE = 1

RFC_CPROG = 0

FORCE_LOCK = 0

CAL_MODE = 3h

EB4

EB7

EB14

EB20

MAIN PLL charge pump source

CAL PLL charge pump source

Force DCDC converter to 0 V

Disable PLLs lock

RF tracking filters calibration mode

Start TDA18211CalibrateRF

End TDA18211CalibrateRF

TDA18211HD Datasheet(PDF) 34 Page - NXP Semiconductors

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