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YMF754 Datasheet, PDF (50/60 Pages) YAMAHA CORPORATION – DS-1E | |||
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YMF754
8. Multiple ACâ97 & Multi-Channel
DS-1E allows connection with up to two ACâ97s, and plays back up to 4-channel PCM data. Therefore, the
following applications can be realized.
8-1. ACâ97 Digital Docking
ACâ97 digital docking can be realized by mounting the secondary ACâ97 on the docking station side. Typical
example of digital docking connection between DS-1E and ACâ97s is represented in the diagram below.
DS-1E
CMCLK
CBCLK
CSYNC
CSDO
CSDI0
RST#
GPIO2
CSDI1
DOCKEN#
PC Side
Docking Station Side
Isolation Buffer
XTL_IN
BIT_CLK
SYNC
SDATA_OUT
SDATA_IN
RESET#
Primary AC'97
DVDD
XTL_IN
BIT_CLK
SYNC
SDATA_OUT
RESET#
SDATA_IN
Secondary AC'97
(AC'97 Rev2.1)
When digital docking interface is made with the main side (PC side) powered on, but docking station side
powered off, it may be not desirable for the secondary ACâ97 that each output signal from the AC-Link is
applied to the secondary ACâ97 that remains in powered off state. In order to avoid such a situation, it is
necessary to place an additional isolation buffer on the PC side (or docking station side).
8-2. 4-Channel Speaker System
4-channel speaker system can be realized by the connection of DS-1E with two 2-channel ACâ97s as
described at â8-1. ACâ97 Digital Dockingâ or using the ACâ97 that includes 4-channel D/A converters.
Then, 4-channel PCM data can be played back at one time.
June 28, 1999
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