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參數(shù)資料
| 型號： | WM9703 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | TVS UNIDIRECT 400W 22V SMA |
| 中文描述： | AC97音頻編解碼器2.1版 |
| 文件頁數(shù)： | 14/30頁 |
| 文件大?。?/td> | 239K |
| 代理商： | WM9703 |
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WM9703
Production Data
WOLFSON MICROELECTRONICS LTD
PD Rev 3.4 January 2001
14
GAIN CONTROL REGISTER LOCATION VERSUS ID
PGA
CODEC ID
CONTROL REG
MUTE DEFAULT
Muted (bit-15)
AND with 38h, 7, 15
AND with 36h, 7, 15
DAC
0x
10
11
18h
Mixer
0x
10
11
0x
10
11
72h
Not-muted (bit-15)
Volume
02h
38h
36h
Muted (15)
Muted (7 and 15)
Muted (7 and15)
Table 5 Gain Control Register Location Versus ID
MASTER/SLAVE ID0/1 SUPPORT
WM9703 supports operation as either a master or a slave codec. Configuration of the device as
either a master or as a slave, is selected by tying the CID pins CID0 and CID1, pins 45 and 46 on the
package.
Fundamentally, a device identified as a master (ID = 00) produces BITCLK as an output, whereas a
slave (any other ID) must be provided with BITCLK as an input. This has the obvious implication that
if the master device on an AC link is disabled, the slave devices cannot function.
The AC
’
97 Revision 2.1 specification defines that the CID pins have inverting sense, and are
provided with internal weak pull ups. Therefore, if no connections are made to the CID0/1 pins, then
the pins pull hi and an ID = 00 is selected, i.e. master. External connects to ground will select other
IDs.
PIN46 CID1
PIN45 CID0
ID
SELECTED
00
01
10
11
MASTER OR
SLAVE
Master
Slave
Slave
Slave
BITCLK
NC
NC
NC
Output
Input
Input
Input
Ground
NC
Ground
Ground
Ground
Table 6 ID Selection
WM9703 supports the AMAP function whereby selection of an ID will automatically map the data
from the interface onto the PCM DACs. This allows a 6-channel audio system to be built using 3
WM9703 devices, with one device configured as a master (ID 00) and the other two as slaves (ID 10
and 11). (See figure 10). In this case, the main channel DACs will have mapped onto them the data
from the normal, surround, and LFE and centre slots respectively, without any user selection.
CODEC ID
AC
–
LINK FRAME DATA
USED FOR DACS
PCM left DAC uses
data from slot No.
3
3
7
6
The codec ID is available to the controller via register 28h, bits D15 and D14
COMMENTS
PCM right DAC uses
data from slot No.
00
01
10
11
4
4
8
9
Original definition (master)
Original definition (docking)
Left/right surround channels
Centre/LFE channels
Table 7 Default Slot to DAC Mappings Based on Codec ID
CODEC ID
SLOTS MAPPED
TO DACS
3 and 4
7 and 8
6 and 9
00 or 01
10
11
Table 8 Slot to DAC and Mapping Based on Codec ID
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| WM9712L | AC97 Audio and Touchpanel CODEC |
| WM9712LEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL | AC97 Audio and Touchpanel CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM9703CFT/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Revision 2.1 Audio Codec |
| WM9704CFT/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:4-Channel Surround Sound Codec |
| WM9704M | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AMC97 Audio and Modem Codec |
| WM9704Q | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:4-Channel Surround Sound Codec |
| WM9705 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Multimedia AC97 CODEC with Integrated Touch Screen Controller |
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