參數資料
型號: TDA9605H
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: Audio processor with head amplifier for VHS hi-fi
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP44
文件頁數: 21/52頁
文件大?。?/td> 244K
代理商: TDA9605H
1999 Apr 14
21
Philips Semiconductors
Product specification
Audio processor with head amplifier for VHS hi-fi
TDA9605H
7.4.3
R
ECORD MODE
During the record-mute mode, the recording output current on pin RECOUT is muted and the head amplifier is partly
disabled. The record mode, set by I
2
C-bus control, can also be changed to the record-mute mode by an external control
signal on pin RMHID. Sometimes the record-mute mode is named loop-through mode or EE mode.
Table 11
Dropout cancelling (bit DOC), sample-and-hold high-state (bit SHH) and detector time hi-fi (bit DETH) in the
record mode
Note
1.
Power-on reset state.
7.4.4
S
YSTEM STANDARD SELECTION
Bit NTSC selects between the NTSC and PAL (SECAM) system carrier frequencies for the CCO modulators or PLL
demodulators and the band-pass filters. FM carrier frequencies of 1.3 and 1.7 MHz are used for the NTSC system where
1.4 and 1.8 MHz are used for the PAL system. Different code settings for the auto-calibration circuit assure proper
calibration using the standard HID control signal frequency of 29.97 Hz for NTSC mode and 25 Hz for PAL mode. After
auto-calibration is completed bit NTSC enables instant switching between the NTSC and PAL system.
Table 12
System standard selection (bit NTSC)
Note
1.
Power-on reset state.
AFM
DOC
SHH
DETH
MODE
DESCRIPTION
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
record-mute
record and 3 dB mix
record and 4.5 dB mix
record and 6 dB mix
record and 8 dB mix
record and 9.5 dB mix
record and 11 dB mix
record and 12.5 dB mix
record-mute and no recording output current; note 1
recording with 3 dB output carrier ratio (1 : 1.4)
recording with 4.5 dB output carrier ratio (1 : 1.7)
recording with 6 dB output carrier ratio (1 : 2)
recording with 8 dB output carrier ratio (1 : 2.5)
recording with 9.5 dB standard output carrier ratio (1 : 3)
recording with 11 dB output carrier ratio (1 : 3.5)
recording with 12.5 dB output carrier ratio (1 : 4.2)
NTSC
MODE
DESCRIPTION
0
1
PAL
NTSC
hi-fi circuit in PAL mode
hi-fi circuit in NTSC mode; note 1
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