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| 型号： | DSRT-L030-011 |
| 厂商： | CONEXANT SYSTEMS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, XMA |
| 文件页数： | 63/86页 |
| 文件大小： | 667K |
| 代理商： | DSRT-L030-011 |
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RipTide PCI Audio/Comm Device Family Product Description
66
ROCKWELL PROPRIETARY INFORMATION
1167
14 Docking Support
The Controller supports a docking station system which contains a second Codec. The DOCKSENSE input provides the
detection mechanism for switching between the two Codec interfaces. Note, when the primary codec interface is used, the
secondary codec is reset and vice-versa.
The primary codec interface consists of the BIT_CLK, SDATA_IN, SDATA_OUT, SYNC and RESET# pins. The secondary
codec interface consists of the BIT_CLKD, SDATA_IND, SDATA_OUT, SYNC and RESETD# pins. RESETD#, BIT_CLKD,
and SDATA_IND should be routed between the Controller from the secondary Codec. The Controller SDATA_OUT and
SYNC signals are shared between the interfaces, and should be routed to both primary and secondary codecs.
14.1
Switching Between Codecs
The DOCKSENSE pin input level determines which Codec is used. Because the data streams and, more importantly, the bit
clocks are being switched, the Controller must perform an Audio reset whenever switching from one Codec to the other.
When DOCKSENSE changes level (e.g., as a result of a laptop computer being inserted into the docking station), the
Controller immediately forces both Codec interfaces into the reset state by driving RESET# and RESETD# low. After about 2
us, the newly selected Codec will be released from reset. Over approximately the next 60
s, the Audio portion of the
Controller will proceed through a reset sequence. When complete, the Controller on-chip processor will re-boot and begin
operation, as if a PCI reset had occurred. From this point on, SDATA_OUT and SYNC are routed to the Docking Station
Codec, and the Laptop PC Codec is not used. Also, the Controller responds to S_DATA_IND and BIT_CLKD rather than
S_DATA_IN and BIT_CLK.
The current docking state (docked or undocked) is also made available to the host PC.
AMC '97 Codec
RipTide
Audio/Comm
Controller
AMC '97 Codec
RESET#
SDATA_OUT
SYNC
SDATA_IN
BIT_CLK
RESETD#
+3V
LapTop PC
Mother Board Chipset
DOCKSENSE
Docking
Station
Connector
SDATA_IND
BIT_CLKD
Laptop PC
Figure 14. Docking Station Application
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相关代理商/技术参数 |
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| DSR-TSS-S1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
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| DSR-TSS-ST2-1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
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