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PDF VT1705 Data sheet ( Hoja de datos )
| Número de pieza | VT1705 | |
| Descripción | High Definition Audio Codec | |
| Fabricantes | VIA | |
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Data Sheet
VT1705
High Definition Audio Codec
June 11, 2009
Revision 1.1
Free Datasheet http://www.datasheet4u.com/
1 page  
Data Sheet
VT1705 High Definition Audio Codec
1
1 Product Features
VT1705
High Definition Audio Codec
1.1 Hardware Features
y Compliant with Intel High Definition
Audio Specification Rev. 1.0
y Exceeds Microsoft Windows Logo
Program (WLP) Requirements
y Three Stereo Digital-to-analog
Converters
– 16-, 20-, 24-bit Resolution
– Audio Sampling Rates: 48 kHz, 96 kHz,
192 kHz, 44.1 kHz, and 88.2 kHz
– DAC SNR: 100 dB
y Two Stereo Analog-to-digital
Converters
– 16-, 20-, 24-bit Resolution
– Audio sampling rates: 48 kHz, 96 kHz,
192 kHz, and 44.1 kHz
– ADC SNR: 93 dB
y Two Independent S/PDIF TX Outputs
– Two Output Pins; the Second One for
Digital Audio Output to a HDMI
Transmitter
– 16-, 20-, 24-bit Resolution
– Audio sampling rates: 48 kHz, 96 kHz,
192 kHz, and 44.1 kHz
y Jack Presence Detection
– Two Jack Detection Pins; Each Detects
up to Four Jacks Plugging
– Jack-detect Circuit with Unsolicited
Response
y Analog Microphone
– Software Selectable Boost Gain (10
dB/ 20dB/ 30dB) for Analog
Microphone Input
– Four Sets of Adjustable Vref-Out Pins
for Microphone Bias
y Three Built-in Headphone Amplifiers
y Front Panel Jack Re-tasking
y Support Smart 5.1 Output and
Mono-out
y High Performance Analog Mixer (for
AA-path)
y High Quality Differential CD Input
y HPF in ADC Path for DC Removal
y Two GPIO (General Purpose Input and
Output) Pins for Customized
Application
y Functionality of Pins:
– Front-panel Headphone, Line Out, Line
In, and Microphone
Pin 14 and Pin 15 (Port E)
Pin 16 and Pin 17 (Port F)
– Line Out, Line In, and Microphone
Pin 21 and Pin 22 (Port B)
Pin 23 and Pin 24 (Port C)
– Headphone and Line Out
Pin 35 and Pin 36 (Port D)
– Line Out
Pin 39 and Pin 41 (Port A)
Pin 43 and Pin 44 (Port G)
y Optimized Management of Pop
Mitigation
y Supports EAPD (External Amplifier
Power Down)
y Power Management and Enhanced
Power Saving Features
y Power Supply
– Digital: 3.3V
– Analog: 5.0V
– Support 1.5 ~ 3.3V I/O for HD Audio
Link
y Package
– Available in 48-Pin LQFP Lead-free and
RoHS Compliant Package
Free Datasheet http://www.datasheet4u.com/
5 Page 
Data Sheet
VT1705 High Definition Audio Codec
7
6 Pin Description
Type
I
O
IO
P
Table 2 – Signal Type Definitions
Description
Input. Standard input-only signal.
Output. Standard active output driver.
Input/output. An input/output signal.
Power.
6.1 Digital I/O Pins
Pin Name
GPIO0 /
S/PDIF_TX1
Pin #
2
GPIO1
SDO
BITCLK
SDI
SYNC
RESETN
EAPD
S/PDIF_TX0
3
5
6
8
10
11
47
48
I/O
IO
IO
I
I
IO
I
I
O
O
Signal Description
General Purpose Input/Output 0 /
The Second S/PDIF Output
General Purpose Input/Output 1
Serial Data Input from Controller
24 MHz Bit Clock from Controller
Serial Data Output to Controller
Sample SYNC from Controller
Hardware Reset from Controller
External Amplifier Power-Down
The First S/PDIF Output
6.2 Analog I/O Pins
Pin Name
Pin #
SENSE_A
13
SENSE_B
34
PORT-E_L
14
PORT-E_R
15
PORT-F_L
PORT-F_R
CD-L
CD-R
PORT-B_L
PORT-B_R
PORT-C_L
PORT-C_R
PORT-D_L
PORT-D_R
PORT-A_L
PORT-A_R
PORT-G_L
PORT-G_R
PCBEEP
VREF_FILTER
VREFOUT-B_L
16
17
18
20
21
22
23
24
35
36
39
41
43
44
12
27
28
I/O
I
I
IO
IO
IO
IO
I
I
IO
IO
IO
IO
O
O
O
O
O
O
I
O
O
Signal Description
Jack Detect Pin 1
Jack Detect Pin 2
Analog I/O. The default setting is output for Front Panel HP Out Left.
Analog I/O. The default setting is output for Front Panel HP Out
Right.
Analog I/O. The default setting is input for Front MIC.
Analog I/O. The default setting is input for Front MIC.
CD Input Left Channel
CD Input Right Channel
Analog I/O. The default setting is input for MIC1 Left.
Analog I/O. The default setting is input for MIC1 Right.
Analog I/O. The default setting is input for Line-in Left.
Analog I/O. The default setting is input for Line-in Right.
Analog Output for Line-out Left
Analog Output for Line-out Right
Analog Output for Surround-out Left
Analog Output for Surround-out Right
Analog Output for Center Line Out.
Analog Output for LFE (Low-Frequency Effect) Line Out
PC Beep Signal Input
Reference Voltage Capacitor
Reference Voltage Output for Port B Left
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet VT1705.PDF ] | |
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