参数资料
型号: TAS3204PAGR
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封装: GREEN, PLASTIC, TQFP-64
文件页数: 75/76页
文件大小: 1224K
代理商: TAS3204PAGR
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
SLES197C – APRIL 2007 – REVISED MARCH 2011
www.ti.com
3
TAS3204 Clocking System
Clock management for the TAS3204 consists of two control structures:
Core Clock management
Oversees the selection of the clock frequencies for the 8051 MCU, the I2C controller, and the audio
DSP core
The master clock (MCLK_IN or XTAL_IN) is the source for these clocks.
In most applications, the master clock drives an on-chip digital phase-locked loop (DPLL), and the
DPLL output drives the MCU and audio DSP clocks.
DPLL bypass mode is also available, in which the high-speed master clock directly drives the MCU
and audio DSP clocks.
Serial Audio Port (SAP) clock management
Oversees SAP master/slave mode
Controls output of SCLKOUT, and LRCLK in the SAP master mode
Figure 3-1 shows a block diagram of the TAS3204 clocking scheme.
Figure 3-1. Clock Generation
3.1
Core Clock Management
The TAS3204 DSP, MCU, and I2C Controller core clocks are derived from the on chip oscillator provided
that an external crystal and associated circutry are provided. .
DSP clock operates at a fixed frequency of 2816 x Fs
MCU clock operates at a fixed frequency of 704 x Fs.
I2controller core operates at a fixed frequency of (256 x Fs).
8
TAS3204 Clocking System
Copyright 2007–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS3204
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