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Teilenummer | VT1616 |
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Beschreibung | 6-Channel AC97 Codec | |
Hersteller | VIA | |
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Gesamt 40 Seiten www.DataSheet4U.com
VIA
Technologies
Incorporated
VT1616
6-Channel AC97 Codec with S/PDIF
Features
Description
• AC’97 2.2 compliant codec
VIA Technologies’ VT1616TM 20-bit ¦∆ audio
• 20-bit, stereo ADC and 6-channel stereo DACs
codec conforms to the AC’97 2.2 and S/PDIF
• 1 Hz resolution VSR on all channels
• Integrated IEC958 line driver for S/PDIF output
• S/PDIF compressed digital or LPCM audio out
Output specifications. The VT1616 integrates
Sample Rate Converters on all channels and can be
adjusted in 1Hz increments. There is a provision in
hardware for down-mixing the 6 channels into
• Hardware downmix option to 2 channels
stereo when only two end points are available. The
• ADC DC removal for removing recording white noise analog mixer circuitry integrates a stereo
• 4-bit 3D stereo expansion for simulated surround
enhancement to provide a pleasing 3D surround
sound effect for stereo media. This codec is
• 4 stereo, 2 mono analog line-level inputs
designed with aggressive power management to
• Second line-level output with volume control
achieve low power consumption. When used with a
• External Audio Amplifier Control
3.3V analog supply, power consumption is further
• Low Power consumption mode
• Exceeds Microsoft® WHQL logo requirements
• 3.3V digital, 3.3 or 5V analog power supply
reduced. The primary applications for this part are
desktop and portable personal computers
multimedia subsystems. However, it is suitable for
any system requiring 6-channel audio output for
• 48-pin LQFP small footprint package
home theater systems at competitive prices.
PC_BEEP
PHONE
LINE
CD
VIDEO
AUX
MIC1
MIC2
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET#
CENTER
+ LFE
PCM OUT
SRC
DAC
VOL
REAR
SURROUND
PCM OUT
SRC
DAC
VOL MUTE
FRONT PCM OUT
SRC
VOL MUTE
DAC
VOL MUTE
VOL MUTE
VOL MUTE
VOL MUTE
VOL MUTE
M VOL
U
X +20dB
VOL MUTE
AC’97
Digital
Interface
MUTE
M VOLUME
U
X
/MUTE
Σ MASTER
VOLUME
Σ 3D
ΣM
U
X
MONO
VOLUME
Σ
M MASTER
U
INPUT
ADC
X VOLUME
XTL_IN
XTL_OUT
OSC
PCM IN
SRC
Figure 1. Functional Block Diagram
Revision 1.5, October 11, 2002
1
LFE/CENTER
LNL/SR_OUT
LINE_OUT
MONO_OUT
S/PDIF_OUT
Data Sheet
www.DataSheet4U.com
VT1616 6-Channel AC97 Codec with S/PDIF
3.3V DVCC
5V AVCC
Regulated power supply
recommended for best
analog performance
1
9 25
38
DVCC1 DVCC2 AVCC1 AVCC2
22pF
2 XTL_IN
24.576MHz 3 XTL_OUT
22pF
LINE
INPUTS
CD
INPUTS
VIDEO
INPUTS
AUXILIARY
INPUTS
MIC1 IN
MIC2 IN
PC BEEP
PHONE
47kΩ
4.7kΩ
1µF
23
1µF
24
1µF
18
1µF
19
1µF
20
1µF
16
1µF
17
1µF
14
1µF
15
1µF
21
1µF
22
1µF
13
0.1µF
12
LINE_IN_L
LINE_IN_R
CD_L
CD_GND
CD_R
VIDEO_L
VIDEO_R
AUX_L
AUX_R
MIC1
MIC2
PHONE
PC_BEEP
2.7nF
ID1 46
ID0 45
1µF
LINE_OUT_L 35
1µF
LINE_OUT_R 36
Master
Codec
Select
1kΩ
1nF 47kΩ
LINE LEVEL
OUTPUTS
1kΩ
1nF 47kΩ
1µF
MONO_OUT 37
1kΩ
1nF
MONO OUTPUT
47kΩ
LNL/SR_OUT_L 39
LNL/SR_OUT_R 41
VT1616
CENTER_OUT
LFE_OUT
43
44
Repeat circuits as above for the
4 surround channels
EAPD
SPDIF_OUT
47
48
VREFOUT 28
VREF 27
220Ω
110Ω
0.1µF
10µF
32
CAP2
RCA
coaxial
S/PDIF
3.3V DVCC
0.1µF
10µF
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET#
DC‘97
10 SYNC
6 BIT_CLK
5 SDATA_OUT
8 SDATA_IN
AFLT2 30
270pF
NPO
11 RESET#
AFLT1 29
270pF
DGND1 DGND2 AGND1 AGND2
NPO
4 7 26 42
Single point connection
Board Digital Ground
Board Analog Ground
Figure 3. Typical Connection Diagram
Revision 1.5, October 11, 2002
6
Data Sheet
6 Page www.DataSheet4U.com
VT1616 6-Channel AC97 Codec with S/PDIF
Line Input Control Register (Index 10h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
Mute – – GL4 GL3 GL2 GL1 GL0 – – – GR4 GR3 GR2 GR1 GR0 8808h
Mute
GL[4:0]
GR[4:0]
Line Input Mute Control
“1” : Mute enabled
“0” : Mute disabled
Left Channel Gain Control
These five bits select the gain applied to the LEFT channel of the Line Input signal. The gain is
programmable from -34.5dB to 12dB in 1.5dB increments, providing a total of 32 programmable
levels. Please refer to Table 3 on page 14 for details.
Right Channel Gain Control
These five bits select the gain applied to the RIGHT channel of the Line Input signal. The gain is
programmable from -34.5dB to 12dB in 1.5dB increments, providing a total of 32 programmable
levels. Please refer to Table 3 on page 14 for details.
CD Input Control Register (Index 12h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
Mute – – GL4 GL3 GL2 GL1 GL0 – – – GR4 GR3 GR2 GR1 GR0 8808h
Mute
CD Input Mute Control
“1” : Mute enabled
“0” : Mute disabled
GL[4:0]
Left Channel Gain Control
These five bits select the gain applied to the Left channel of the CD Input signal. The gain is
programmable from -34.5dB to 12dB in 1.5dB increments, providing a total of 32 programmable
levels. Please refer to Table 3 on page 14 for details.
GR[4:0]
Right Channel Gain Control
These five bits select the gain applied to the Right channel of the CD Input signal. The gain is
programmable from -34.5dB to 12dB in 1.5dB increments, providing a total of 32 programmable
levels. Please refer to Table 3 on page 14 for details.
Revision 1.5, October 11, 2002
12
Data Sheet
12 Page | ||
Seiten | Gesamt 40 Seiten | |
PDF Download | [ VT1616 Schematic.PDF ] |
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