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TLC320AD90CPM Datasheet(PDF) 48 Page - Texas Instruments

Part # TLC320AD90CPM
Description  Stereo Audio Codec
Download  51 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLC320AD90CPM Datasheet(HTML) 48 Page - Texas Instruments

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5–2
5.2
The Texas Instruments TLC320AD90C Connected to an AC‘97 Compliant
Digital Controller
The TLC320AD90C communicates with an AC‘97 compliant digital controller through the digital serial link
or AC-Link. In addition to all digital audio streams, command and status information is also communicated
over this point-to-point serial connection. This connection is shown in Figure 5–2.
AC’97 Compliant
Digital Controller
TLC320AC90C
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET
Figure 5–2. Connection to an AC‘97 Digital Controller
5.3
Testability
5.3.1
Activating the Test Modes
The TLC320AD90C has two test modes. One mode is for ATE in circuit test and the other mode is for Texas
Instruments specific tests. The two test modes are activated according to the following:
The TLC320AD90C enters the ATE in circuit test mode if SDATA_OUT is sampled high at the
trailing edge of RESET.
The TLC320AD90C enters the Texas Instruments test mode when coming out of reset if SYNC
is high.
The TLC320AD90C enters Texas Instruments Scan Test mode when coming out of RESET when
both SYNC and SDATA_OUT are held high.
These cases should never occur during standard operating conditions.
Regardless of the test mode, the digital controller must issue a cold reset to resume normal operation of the
TLC320AD90C.
5.3.2
Test Mode Functions – ATE in Circuit Test Mode
When the TLC320AD90C is placed in the ATE test mode, the TLC32AD90C digital AC-Link outputs (i.e.,
BIT_CLK and SDATA_IN) are driven to a high-impedance state. This condition allows ATE in circuit testing
of the digital controller.


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