VT1616 데이터 시트보기 (PDF) - Unspecified

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VT1616

6-Channel AC97 Codec with S/PDIF

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VT1616 6-Channel AC97 Codec with S/PDIF

Register Descriptions

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 VT1616 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. 2.2 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

ML[4:0]

MR[4:0]

Stereo Output Mute Control

“1” : Mute enabled

“0” : Mute disabled

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 2 on page 10 for details.

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 2 on page 10 for details.

Revision 1.5, October 11, 2002

8

Data Sheet

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