參數(shù)資料
型號(hào)： TLC320AD90C
廠商： Texas Instruments, Inc.
元件分類： Codec
英文描述： Stereo Audio Codec(立體聲音頻編碼譯碼器)
中文描述： 立體聲音頻編解碼器（立體聲音頻編碼譯碼器）
文件頁數(shù)： 31/51頁
文件大?。?/td> 219K
代理商： TLC320AD90C
2–17
2.5
The three types of TLC320AD90C resets include the following:
Resetting the TLC320AD90C
A cold reset where all TLC320AD90C logic (registers included) is initialized to the default state.
This reset is accomplished by asserting RESET.
A warm reset where the contents of the TLC320AD90C register set are left unaltered. This reset
is accomplished by asserting SYNC during an AC-Link power-down state.
A register reset which only initializes the TLC320AD90C registers to their default states. See
Section 2.3, Software Interface register 0h.
After signaling a reset to the TLC320AD90C, the digital controller should not attempt to play or capture audio
data until it has sampled a codec ready indication from the TLC320AD90C.
2.5.1
A cold reset is achieved by asserting RESET for 1
μ
s. By driving RESET low, BIT_CLK and SDATA_OUT
are activated, or reactivated, and all TLC320AD90C control registers are initialized to default power-on reset
values.
Cold Reset
RESET is an asynchronous input.
2.5.2
The AC-Link can be put in a low-power consumption state (see Section 2.3, Software Interface). In this state,
all signals become inactive including BIT_CLK, and SYNC. A warm TLC320AD90C reset reactivates the
AC-Link without altering the current TLC320AD90C register values. A warm reset is signaled by driving
SYNC high for a minimum of 1
μ
s in the absence of BIT_CLK.
Warm Reset
Within normal audio frames, SYNC is a synchronous TLC320AD90C input. However, in the absence of
BIT_CLK, SYNC is treated as an asynchronous input used in the generation of a warm reset to the
TLC320AD90C.
The TLC320AD90C does not respond with the activation of BIT_CLK until SYNC has been sampled low
again by the TLC320AD90C. This precludes the false detection of a new audio frame.
2.5.3
Once either of the two test modes have been entered, the TLC320AD90C must be issued another reset with
all AC-Link signals low to return to the normal operating mode.
Reset From Test Mode
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TLC320V320CFNR 制造商:Texas Instruments 功能描述:
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