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參數(shù)資料
| 型號： | TDA9615H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Audio processor for VHS hi-fi(應用于VHS高保真的音頻處理器) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 X 1.75 MM, PLASTIC, SOT-307-2, QFP-44 |
| 文件頁數(shù)： | 21/44頁 |
| 文件大?。?/td> | 263K |
| 代理商： | TDA9615H |
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1997 Jun 16
21
Philips Semiconductors
Preliminary specification
Audio processor for VHS hi-fi
TDA9615H
Table 30
Bit PORR; note 1
Notes
1.
Bit POR of the read byte can be used to detect the occurrence of a power-on reset situation (bit POR reads logic 1
in case the I
2
C register contents equal the POR default state). When applying bit POR this way, PORR should be
used after a power-on reset to force a reset of the POR read bit state to logic 0.
POR.
2.
Read byte (device state information)
Table 31
Bits of read byte
Table 32
Bit CALR; notes 1 and 2
Notes
1.
Bit CALR = 0 indicates the device is not calibrated. After an automatic calibration is started by setting bit CALS of the
power byte the end of calibration is signalled by this bit. If for some reason a calibration cannot be completed (e.g.
no HID signal available or hi-fi processing is in ‘playback’ mode) CALR remains logic ‘0’. If calibration is lost due to
a power-on reset situation CALR will return to logic 0 as well.
Also the envelope output (pin 39) can be used to check for end of calibration.
2.
Table 33
Bit AUTN; notes 1 and 2
Notes
1.
When hi-fi processing is in ‘playback’ mode but no hi-fi carrier input signal is detected the auto-normal function is
activated. Auto-normal overrules the ‘Output Select’ mode setting, selecting normal sound (i.e. linear audio) instead
of hi-fi. The state of this auto-normal function can be checked via bit AUTN.
The auto-normal function is only active (bit AUTN = logic 1) for hi-fi ‘playback’ mode (bit AFM = 0); during ‘record’ or
‘loop-through’ mode bit AUTN is always logic 0.
2.
PORR
MODE
DESCRIPTION
0
1
(note 2)
POR reset
reset of POR signal bit
BIT
DESCRIPTION
CALR
AUTN
POR
calibration ready; see Table 32
auto-normal; see Table 33
power-on reset; see Table 34
CALR
DESCRIPTION
0
1
device is not calibrated
device has completed auto-calibration
AUTN
DESCRIPTION
0
1
audio FM signal is detected at FM input
no audio FM signal detected; normal sound is selected instead of hi-fi
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