TDA18271HD NXP Semiconductors, TDA18271HD Datasheet - Page 32

• Manufacturer Part Number: TDA18271HD
• Description: Silicon Tuner IC
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA18271HD_3
Product data sheet
Fig 13. Flowchart TDA18271PowerScan
freq_MAINPLL
RF_BAND_map
RF_CAL_map
CID_Target_map
MS
freq_input
freq_MAINPLL
freq_input
sgn
count
freq_input
freq_MAINPLL
count
bcal = 1
freq_output = freq_MAINPLL
Wait 100 s - PLL locking
CID_GAIN
TDA18271PowerScan
Actions
Find RF_BAND = f
Find Cprog_table = f
Find GAIN_TAPER = f
Find CID_Target count_limit = f
CID_Target_map
Tuner register update
freq_MAINPLL = freq_input = 1 MHz
Downconvert freq_input to 1 MHz
Call TDA18271CalcMAINPLL
Wait 5 ms - PLL locking
Detection mode
Launch power detection measurement
Read power detection information
Call TDA18271ReadExtended
Algorithm Initialization
sgn = 1
freq_output = freq_input
bcal = 0
count = 0
wait = false
freq_MAINPLL = freq_input + (sgn
Downconvert updated freq_input to 1 MHz
Call TDA18271CalcMAINPLL
Launch power detection measurement
Read power detection information
Call TDA18271ReadExtended
count = count + 200
Rev. 03 — 11 September 2008
End
CID_Target
Yes
No
No
sgn =
count = 200
wait = true
CID_GAIN < CID_Target
No
No
TDA18271PowerScan
count > count_limit
RF(max)
sgn
1 MHz
RF(max)
RF(max)
wait = true
No
sgn > 0
Start
in RF_BAND_map (MS)
in RF_CAL_map
Yes
Yes
Yes
in GAIN_TAPER_map
bcal
freq_output
RF(max)
Wait 5 ms - PLL locking
wait = false
count) + 1 MHz
Yes
in
freq_input
Internal table
RF_BAND = RF_BAND
RFC_Cprog = Cprog_table
GAIN_TAPER = GAIN_TAPER
CID_Target = CID_Target
count_limit = count_limit
-
CAL_MODE = 1
-
-
bcal = 0
freq_output = freq_input
TDA18271PowerScan
End
TDA18271HD
I
-
EP2, EB14
EP4
EP2
EP2
2
C-bus
www.DataSheet4U.com
MS
© NXP B.V. 2008. All rights reserved.
Silicon Tuner IC
bcal
freq_output
freq_MAINPLL
CID_GAIN
freq_MAINPLL
wait
CID_GAIN
count
CID_Target
count_limit
sgn
count
wait
sgn
freq_output
bcal
count
wait
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