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PDF ( 数据手册 , 数据表 ) VT1617

零件编号 VT1617
描述 Vinyl Eight-TRAC AC97 Codec
制造商 VIA
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VT1617 数据手册, 描述, 功能
Data Sheet
VT1617
Vinyl Eight-TRAC
AC’97 Codec
Revision 1.2
March 3, 2005
VIA TECHNOLOGIES, INC.







VT1617 pdf, 数据表
VT1617 Vinyl Eight-TRAC AC’97 Codec
Software features
– Built-in Smart 5.1™
– Immerzio™ 3D Supports EAX1.0, EAX2.0, A3D™1.X, I3DL2, etc…
– Fancy and Friendly Audio Deck
Power
– Low power consumption mode
– 3.3V or 5V analog, 3.3V digital power supply
Package
– 48-Pin LQFP Package
Revision 1.2, March 3, 2005
-2-
Features







VT1617 equivalent, schematic
Register Descriptions
VT1617 Vinyl Eight-TRAC AC’97 Codec
Reset Register (Index 00h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
– SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 6D50h
The Reset register is used to configure the hardware to a known state or to read the ID code of the part. A code was
assigned to VIA Technologies (27 = 11011h) for 3D Stereo Enhancement reflected in SE[4:0]. ID8 and ID6 are set to
1b to report that the ADC and DAC are 20-bit resolution respectively. The VT1617 supports an alternate line level
out with independent volume control as reflected by ID4=1b. However, since pins 39 and 41 are shared with the
Surround DAC outputs, register 5Ah, bit 15, LVL has to be set to “1”. Writing data to this register will set all the
mixer registers to their default values. For description of the bits set to 0b, refer to AC’97 Rev. 2.3 spec.
Stereo Output Control Register (Index 02h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
Mute – – ML4 ML3 ML2 ML1 ML0 – – – MR4 MR3 MR2 MR1 MR0 8000h
Mute
Stereo Output Mute Control
“1” : Mute enabled
“0” : Mute disabled
ML[4:0]
Master Output (Left Channel) Volume Control
These five bits select the level of attenuation applied to the Left channel of the Stereo Output
signal. The level of attenuation is programmable from 0dB to -46.5dB in 1.5dB increments,
providing a total of 32 programmable levels. Please refer to Table 4 on page 11 for details.
MR[4:0]
Master Output (Right Channel) Volume Control
These five bits select the level of attenuation applied to the Right channel of the Stereo Output
signal. The level of attenuation is programmable from 0dB to -46.5dB in 1.5dB increments,
providing a total of 32 programmable levels. Please refer to Table 4 on page 11 for details.
Revision 1.2, March 3, 2005
-10-
Register Descriptions










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