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參數(shù)資料
| 型號： | TSC2302IRGZRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封裝： | GREEN, PLASTIC, VQFN-48 |
| 文件頁數(shù)： | 54/85頁 |
| 文件大?。?/td> | 1483K |
| 代理商： | TSC2302IRGZRG4 |
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TSC2302
SLAS394 – JULY 2003
AUDIO CODEC
Audio Analog I/O
The TSC2302 has one pair of stereo inputs, LLINEIN and RLINEIN, and one mono audio input, MICIN. The part
also has a stereo headphone output amplifier capable of driving a 16-
load at up to 30 mW/channel, HPL and
HPR. Finally, the part includes a mono output capable of driving a 10-k
load, MONO.
The common-mode voltage, VCM, used by the audio section can be powered up independently by the AVPD bit
(Bit 14, Reg 05h, Pg 2). Because the audio outputs are biased to this voltage, this voltage is slowly ramped up
when powered on, and there is an internally programmed delay of approximately 500 ms between powering up
this voltage and unmuting the analog audio signals of the TSC2302, in order to avoid pops and clicks on the
outputs. It is recommended to keep VCM powered up if the 500-ms delay is not tolerable.
Audio Digital I/O
Digital audio data samples can be transmitted between the TSC2302 and the CPU via the I2S bus (BCLK,
LRCLK, I2SDIN, I2SDOUT). However, all registers, including those pertaining to audio functionality, are only
accessible via the SPI bus. The I2S bus operates only in slave mode, meaning the BCLK and LRCLK must be
provided as inputs to the part. Four programmable modes for this serial bus are supported and can be set
through the I2SFM bits (Bits[1:0], Reg 00h, Pg 2) .
PCM Audio Interface
The 4-wire digital audio interface for TSC2302 is comprised of BCLK (pin 24), LRCLK (pin 25), I2SDIN (pin 26),
and I2SDOUT (pin 27). For the TSC2302, these formats are selected through the I2SFM bits in Reg 00h, Pg 2.
The following figures illustrate audio data input/output formats and timing.
The TSC2302 can accept 32-, 48-, or 64-bit clocks (BCKIN) in one clock of LRCIN. Only 16-bit data formats can
be selected when 32-bit clocks/LRCIN are applied.
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