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TDA9605H/N2 View Datasheet(PDF) - Philips Electronics

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TDA9605H/N2 Datasheet PDF : 52 Pages
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Philips Semiconductors
Audio processor with head amplifier for VHS hi-fi
Product specification
TDA9605H
7.4.3 RECORD 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 I2C-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
AFM
1
1
1
1
1
1
1
1
DOC
0
0
0
0
1
1
1
1
SHH
0
0
1
1
0
0
1
1
DETH
MODE
0 record-mute
1 record and 3 dB mix
0 record and 4.5 dB mix
1 record and 6 dB mix
0 record and 8 dB mix
1 record and 9.5 dB mix
0 record and 11 dB mix
1 record and 12.5 dB mix
DESCRIPTION
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)
Note
1. Power-on reset state.
7.4.4 SYSTEM 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)
NTSC
0
1
PAL
NTSC
MODE
Note
1. Power-on reset state.
DESCRIPTION
hi-fi circuit in PAL mode
hi-fi circuit in NTSC mode; note 1
1999 Apr 14
21
 

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