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TDA18271HD_09 데이터시트(Datasheet) 30 Page - NXP Semiconductors

부품명 TDA18271HD_09
상세내용  Silicon Tuner IC
PDF  70 Pages
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제조사  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
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 30 page
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TDA18271HD_4
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 19 May 2009
30 of 70
NXP Semiconductors
TDA18271HD
Silicon Tuner IC
Fig 11. Flowchart TDA18271RFTrackingFiltersInit
001aah047
Look for optimized calibration frequency
Call TDA18271PowerScan
RF_A1 = 0, RF_B1 = 0, RF_A2 = 0, RF_B2 = 0
Find Cprog_table = fRF(max) in RF_CAL_map
Find RF1_default, RF2_default, RF3_default = fRF(max) in RF_Band_map
RF1_default
RF1_default,
RF2_default,
RF3_default
Cprog_table1
bcal
RF1
Start
TDA18271RFTrackingFiltersInit
End
TDA18271 RFTrackingFiltersInit
bcal = 1
MS
RF1
RF_B1
RF_A1
No
Yes
bcal = 0
No
Yes
RF2_default = 0
Yes
No
Look for optimized calibration frequency
Call TDA18271PowerScan
RF2_default
bcal
RF2
MS
RF2
Find Cprog_cal1 to track RF1
Call TDA18271CalibrateRF
RF1
RF1
RF_CAL_map
Cprog_cal1 = Cprog_table1
Cprog_cal1
Cprog_table1
RF_B1 = Cprog_cal1
− Cprog_table1
RF1
Cprog_cal1
Cprog_table1
Cprog_cal1
MS
Find Cprog_table = fRF(max) in RF_CAL_map
Cprog_table2
End
TDA18271 RFTrackingFiltersInit
bcal = 1
RF_A1
No
Yes
bcal = 0
No
Yes
RF3_default = 0
Yes
Find Cprog_cal2 to track RF2
Call TDA18271CalibrateRF
RF2
RF2
RF_CAL_map
Cprog_cal2 = Cprog_table2
Cprog_cal2
RF_A1 = (Cprog_cal2
− Cprog_table2 − Cprog_cal1 + Cprog_table1) /
(RF2
− RF1)
RF1
RF2
Cprog_cal1
Cprog_cal2
Cprog_table1
Cprog_table2
RF_A2
RF_B2
RF_A2 = (Cprog_cal3
− Cprog_table3 − Cprog_cal2 + Cprog_table2)/(RF3 − RF2)
RF_B2 = Cprog_cal2
− Cprog_table2
RF2
RF3
Cprog_cal2
Cprog_cal3
Cprog_table2
Cprog_table3
Cprog_cal2
MS
No
Look for optimized calibration frequency
Call TDA18271PowerScan
RF3_default
bcal
RF3
MS
RF3
Find Cprog_table = fRF(max) in RF_CAL_map
Cprog_table3
End
TDA18271RFTrackingFiltersInit
bcal = 1
No
Yes
bcal = 0
No
Yes
Find Cprog_cal3 to track RF3
Call TDA18271CalibrateRF
RF3
RF3
RF_CAL_map
Cprog_cal3 = Cprog_table3
Cprog_cal3
Cprog_table3
Cprog_cal3
MS
Cprog_table2




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