參數(shù)資料
型號(hào)： TDA9605H
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)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(yè)數(shù)： 20/52頁(yè)
文件大?。?/td> 244K
代理商： TDA9605H
1999 Apr 14
20
Philips Semiconductors
Product specification
Audio processor with head amplifier for VHS hi-fi
TDA9605H
7.4
Control byte at subaddress 00H
The control byte is used to set the parameters of hi-fi processing and head amplifier control.
7.4.1
A
UDIO
FM
MODE
Bit AFM controls the main mode of the hi-fi processing and head amplifier. The function of other bits of the control byte
and bit EOS of the output byte depends on the state of bit AFM.
Table 9
Audio FM mode selection (bit AFM)
7.4.2
P
LAYBACK MODE
When during the playback mode no FM carrier is detected from tape, the normal audio signal on pin LININ is
automatically selected by the output select function.
For this auto-normal mode:
The timing of the hi-fi carrier detection can be selected via bit DETH which defines the auto-normal release time:
– Fast mode: hi-fi detection delay is 1 to 2 HID control signal periods (for NTSC: 33 to 66 ms; for PAL: 40 to 80 ms)
– Slow mode: hi-fi detection delay is 7 to 8 HID control signal periods (for NTSC: 233 to 267 ms;
for PAL: 280 to 320 ms).
The state of hi-fi detection and auto-normal can be monitored by I
2
C-bus control bit AUTN of the read byte.
In case automatic selection of the normal audio signal is not required the normal input level control can be set to mute
(bits NIL3 to NIL0 of the select byte).
Table 10
Dropout cancelling (bit DOC), sample-and-hold high-state (bit SHH) and detector time hi-fi (bit DETH) in the
playback mode; note 1
Note
1.
X = don’t care.
Playback head amplifier disable
standard operating mode and playback
disabled
power mute
standard operating mode, active standby
and passive standby
HPD
Power output muting
Operating mode
MUTE
STBP and STBA
AFM
MODE
DESCRIPTION
0
1
playback
record
hi-fi processing in playback mode and head amplifier in playback mode
hi-fi processing in record mode and head amplifier is in record mode or record-mute mode
AFM DOC SHH DETH
MODE
DESCRIPTION
0
0
0
0
0
0
0
1
X
X
X
X
X
X
0
1
X
X
X
X
X
X
0
1
playback and DOC off
playback and DOC on
playback and sample-and-hold time = 6
μ
s
playback and sample-and-hold time = 8
μ
s
playback and hi-fi detect = fast
playback and hi-fi detect = slow
dropout cancelling disabled
dropout cancelling active
head switch noise cancel time set to 6
μ
s
head switch noise cancel time set to 8
μ
s
fast mode hi-fi detector timing
slow mode hi-fi detector timing
FUNCTION
MODES
CONTROL BITS
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