參數(shù)資料
型號: STV8227
廠商: 意法半導體
英文描述: Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
中文描述: 數(shù)字音頻解碼器/處理器為A2和麗音電視/錄像機
文件頁數(shù): 81/149頁
文件大小: 2775K
代理商: STV8227
81/149
STV82x7
Register List
Note:
AV_DELAY acts on both LS and HP paths simultaneously (same delay).
12.12 Automatic Standard Recognition
AUTOSTD_CTRL
Automatic Standard Recognition Control Register
Note:
Only standard deviation FM 50K kHz is compatible with other D/K1/K2/K3 standards in Automatic
Standard Recognition Search mode.
FM deviation superior to 350 kHz will degrade strongly NICAM reception due to overlapping of FM
and QPSK IF spectrum in DK-NICAM standard.
Bit Name
Reset
Function
DELAY_TIME
0000000
Audio Delay Time
0000000: 0 ms
...
0111100: 60 ms (48kHz)
...
1011010: 90 ms (32kHz)
DELAY_ON
0
Audio/video delay is enabled when set.
Address: 8Ah
Type: R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
FORCE_SQUE
LCH
SINGLE_SHOT
DK_DEV[1:0]
LDK_SW
Bit Name
Reset
Function
Bits[7:5]
000
Reserved.
FORCE_SQUELCH
0
Allow to force squelch detection
0: FM squelch is taken into consideration for MONO detection
1: FM squelch is not taken into consideration for MONO detection
SINGLE_SHOT
0
Single Shot Mode Selection
0: Single Shot mode is not selected
1: Single Shot mode is selected
1
1.
Single_Shot
mode can be used before disabling the Automatic Standard Recognition
(Autostandard) to pre-program demodulator registers in a defined standard and reduce I2C
programming in Manual mode
DK_DEV[1:0]
00
Selects FM deviation configuration to take into account of overmodulation in DK_NICAM standard.
00: FM 50 kHz (Default)
01: FM 200 kHz
10: FM 350 kHz
11: FM 500 kHz
LDK_SW
1
Makes exclusive the auto search of DK/K1/K2/K3 and L/L standard
0: DK/K1/K2/K3 standard auto-search / L/L disabled
1: L/L standard auto-search / DK/K1/K2/K3 disabled
相關PDF資料
PDF描述
STV8217 Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
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