參數(shù)資料
型號(hào)： TDA9615
廠商： NXP Semiconductors N.V.
英文描述： DIODE,TVS,BI,20V,1500W,J-LEAD
中文描述： 音頻處理器錄影帶高保真
文件頁(yè)數(shù)： 12/44頁(yè)
文件大小： 263K
代理商： TDA9615
1997 Jun 16
12
Philips Semiconductors
Preliminary specification
Audio processor for VHS hi-fi
TDA9615H
3.
Modes ‘loop-through’ and ‘record’ are equal in audio signal flow; FMOUT (pin 36) however is muted during
‘loop-through’ mode.
POR.
4.
Table 7
Bit NTSC
Notes
1.
Bit NTSC selects between the system standard settings for NTSC and PAL (SECAM) use. The auto-calibration
function uses the system standard HID frequency of 29.97 Hz for NTSC and 25 Hz for PAL. After calibration bit NTSC
allows immediate switching between the NTSC and PAL system standard.
POR.
2.
Table 8
Bit MUTE
Notes
1.
Bit MUTE controls the line and RFC output mute switches at pins 13, 14 and 17 (power mute function). Power mute
is also automatically activated at supply voltage power-up or power-down (V
CC
; pin 35).
POR.
2.
Table 9
Bits STBP and STBA
Notes
1.
2.
POR.
By selecting STBA = 1 the TDA9615H is switched to low-power ‘a(chǎn)ctive standby’ mode. To reduce power
consumption most circuits are switched off. RFC, line and decoder outputs however remain active. This way the
direct audio selections offered via the line output select and decoder output select functions (bits LOS and DOS of
the output byte) remain operable in this mode. The ‘Output Select’ mode signal is muted.
Calibration and I
2
C-bus registers are not affected by using ‘a(chǎn)ctive standby’ or ‘passive standby’ mode.
By selecting STBP = 1 the TDA9615H is switched to minimum power ‘passive standby’ mode. All circuits except
power mute, I
2
C-bus and the line input reference buffer (voltage at pins 1 to 10 and 44) are switched off for minimum
power consumption. Use of the power mute function (bit MUTE of control byte) ensures pop-free switching of the line
and RFC output to and from ‘passive standby’ mode. To obtain minimum power consumption the power mute
function should be de-activated again during ‘passive standby’ mode.
X = don’t care.
3.
4.
5.
NTSC
(1)
MODE
DESCRIPTION
0
1
PAL
NTSC
(2)
hi-fi circuit in ‘PAL’ mode (FM carriers: 1.4 and 1.8 MHz)
hi-fi circuit in ‘NTSC’ mode (FM carriers: 1.3 and 1.7 MHz)
MUTE
(1)
MODE
DESCRIPTION
0
1
mute
(2)
power mute function released; mute switches open
power mute function activated; mute switches closed
STBP
STBA
MODE
DESCRIPTION
0
0
1
(4)
0
1
(2)
X
(5)
(note 1)
active standby
(3)
passive standby
(3)
full operation
standby mode; reduced power consumption
standby mode; minimum power consumption
相關(guān)PDF資料
PDF描述
TDA9615H Audio processor for VHS hi-fi(應(yīng)用于VHS高保真的音頻處理器)
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