tda18211hd NXP Semiconductors, tda18211hd Datasheet - Page 38

• Manufacturer Part Number: tda18211hd
• Description: Dvb-t Silicon Tuner Ic
• Manufacturer: NXP Semiconductors

Fig 17. Flowchart TDA18211ChannelConfiguration
Standard
STANDARD_DESCRIPTION_
map
IR_MEAS_map
BP_FILTER_map
RF_BAND_map
GAIN_TAPER_map
freq_input
MS
MS
freq_input
IF_freq
freq_pll
End TDA18211ChannelConfiguration
Tune to wanted channel frequency
Call TDA18211CalcMAINPLL
Tuner registers update
MAIN PLL charge pump source
Wait 1 ms
Normal operation for the MAIN PLL
Wait 20 ms
Switch RFAGC to normal speed mode
Actions
Standard mode update
Update TV broadcast parameters
Switch RFAGC to high speed mode
Normal mode
Update IF output level
Update IF notch frequency
Update extended byte 22
Update IF center frequency
Disable power level indicator
Update frequency dependent parameters
Find IR_MEAS = f
Find BP_FILTER = f
Find RF_BAND = f
Find GAIN_TAPER = f
Dual-tuner and AGC1 extra configurations managing
MAIN VCO when Master, CAL VCO when Slave
AGC1 always active
AGC1 has priority on AGC2
Tuner registers update
freq_pll = freq_input + IF_freq
Start TDA18211ChannelConfiguration
RF(max)
RF(max)
RF(max)
RF(max)
in IR_MEAS_map
in RF_BAND_map
in BP_FILTER_map
in GAIN_TAPER_map
yes
LO_FORCESRCE = 1
LO_FORCESRCE = 0
STD[2] = 1
-
MS = 1
TM ... EP5
EB4
EB4
EP3
CALVCO_FORLON = MS
AGC1_ALWAYS_MASTERN = 0
AGC_FIRSTN = 0
-
Internal table
STD = STD from STANDARD_DESCRIPTION_map according to Standard value
STD[2] = 0
CAL_MODE = 0
IF_LEVEL = IF_LEVEL from STANDARD_DESCRIPTION_map according to Standard
IF_NOTCH = IF_NOTCH from STANDARD_DESCRIPTION_map according to Standard
EB22 = EB22 from STANDARD_DESCRIPTION_map according to Standard
IF_FREQ = IF_FREQ from STANDARD_DESCRIPTION_map according to Standard
DIS_POWER_LEVEL = 1
IR_MEAS = IR_MEAS
BP_FILTER = BP_FILTER
RF_BAND = RF_BAND
GAIN_TAPER = GAIN_TAPER
no
freq_pll
CAL_PLL_map
freq_pll
End TDA18211ChannelConfiguration
Tune to wanted channel frequency
Call TDA18211CalcCALPLL
Find CAL_POST_DIV = f
CAL_PLL_map
Tuner registers update
CAL PLL charge pump source
Wait 1 ms
Normal operation for the CAL PLL
Wait 20 ms
Switch RFAGC to normal speed mode STD[2] = 1
LO(max)
in
MPD = CAL_POST_DIV && 7Fh MPD
CAL_FORCESRCE = 1
CAL_FORCESRCE = 0
-
-
EB1
001aag947
I
-
-
-
-
EB22
-
-
-
MS
2
TM ... EP5
EB5
EB5
EP3
C-bus
IF_freq