參數(shù)資料
型號(hào): TAS3202PAGR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝: GREEN, PLASTIC, TQFP-64
文件頁數(shù): 45/66頁
文件大小: 817K
代理商: TAS3202PAGR
DPLL
×5.5
÷4
135-MHz DCLK
Microprocessor Clock
MCLK_OUT
MCLK_OUT2
MCLK_OUT3
Programmable
Divider
÷2
÷64
÷2
Programmable
Divider
Master/
Slave
LRCLK_OUT
SCLK_OUT
SDOUT
To DAP
Parallel
Data
SDIN
From DAP
Parallel
Data
LRCLK
Re-Creation
Serial
Audio Port
Receiver
Serial
Audio Port
Transmitter
256Fs
128Fs
64Fs
512Fs
Crystal
MCLKI
24.576 MHz
Oscillator
24.576 MHz
www.ti.com
SLES208B – JUNE 2009 – REVISED MARCH 2011
2.5
Clocks, Digital Phase-Locked Loop (PLL), and Serial Data Interface
These modules provide the timing and serial data interface for the TAS3202. The clocking system for the
device is illustrated in Figure 2-1. The TAS3202 can be either clock master or clock slave depending on
the configuration. However, clock master mode is the primary mode of operation.
Figure 2-1. Clock Generation
DISCLAIMER: Analog performance is not ensured in slave mode, as the analog performance depends
upon the quality of the MCLK_IN. The TAS3202 is not robust with respect to MCLK_IN errors (glitches,
etc.); if the MCLK_IN frequency changes under operation, the device must be reset.
I2C clock master operation:
External 512Fs crystal oscillator is used to generate all internal clocks plus all clocks for external
asynchronous sampling rate converter (ASRC) output (if external ASRC is present).
LRCLK_OUT is fixed at 48 kHz (Fs).
SCLK_OUT is fixed at 64Fs.
MCLK_OUT is fixed at 256Fs. In master mode, the external ASRC converts incoming serial audio data
to 48-kHz sample rate synchronous to the internally generated serial audio data clocks.
In master mode, all clocks generated for the TAS3202 are derived from the 24.576-MHz crystal. The
internal oscillator drives the crystal and generates the main clock to digital PLL (DPLL), master clock
outputs, 256Fs clock to the ADC, and 128Fs clock to the DAC. The DPLL generates internal clocks for
the DAP and the 8051 microprocessor.
Copyright 2009–2011, Texas Instruments Incorporated
Functional Description
5
Product Folder Link(s): TAS3202
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