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STV8247 bảng dữ liệu(PDF) 72 Page - STMicroelectronics

tên linh kiện STV8247
Giải thích chi tiết về linh kiện  Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
PDF  156 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV8247 bảng dữ liệu(HTML) 72 Page - STMicroelectronics

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Register List
STV82x7
72/156
CRF1
Channel 1 Baseband PLL Demodulator Offset
CETH1
Channel 1 FM/AM Carrier Level Threshold
SQTH1
Channel 1 FM Squelch Threshold Register
Address: 1Fh
Type: R
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CRF1[7:0]
Bit Name
Reset
Function
CRF1[7:0]
(00000000) Channel 1 Carrier Recovery Frequency
Displays the instantaneous frequency offset of the Channel 1 Baseband PLL Demodulator.
Address: 20h
Type: R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CETH1[7:0]
Bit Name
Reset
Function
CETH1[7:0]
00100000
This register is used to compare the carrier level in the channel and the threshold value. This
level is measured after the channel filter and is relative to the full scale reference level (0 dB).
This is used as part of the validation of an FM signal, if the carrier level is below the threshold,
the signal is considered to be non-valid.
CETH
Threshold (dB)
CETH
Threshold (dB)
FFh
-6
10h
-32 (Recommended Value)
80h
-12
08h
-38
40h
-18
00h
OFF (all carrier levels are accepted)
20h
-24 (Default)
Address: 21h
Type: R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SQTH1[7:0]



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