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参数资料
| 型号： | TAS3204PAG |
| 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： | 16/76页 |
| 文件大小： | 1224K |
| 代理商： | TAS3204PAG |
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47
40 39
32 31
24 23 22 21 20 19
16 15
8 7
0
16-Bit Audio
18-Bit Audio
20-Bit Audio
24-Bit Audio
Precision/Noise Bits
Overhead/
Guard Bits
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
(-73)
(-51)
(-124)
(-45)
(57)
(59)
(-110)
-73
-124
57
-110
-51
+
-45
+
59
+
Rollover
+
www.ti.com
SLES197C – APRIL 2007 – REVISED MARCH 2011
7.3
DAP Data Word Structure
Figure 7-2 shows the data word structure of the DAP arithmetic unit. Eight bits of overhead or guard bits
are provided at the upper end of the 48-bit DAP word, and 16 bits of computational precision or noise bits
are provided at the lower end of the 48-bit word. The incoming digital audio words are all positioned with
the most significant bit abutting the 8-bit overhead/guard boundary. The sign bit in bit 39 indicates that all
incoming audio samples are treated as signed data samples The arithmetic engine is a 48-bit (25.23
format) processor consisting of a general-purpose 76-bit arithmetic logic unit and function-specific
arithmetic blocks. Multiply operations (excluding the function-specific arithmetic blocks) always involve
48-bit DAP words and 28-bit coefficients (usually I2C programmable coefficients). If a group of products is
to be added together, the 76-bit product of each multiplication is applied to a 76-bit adder, where a
DSP-like multiply-accumulate (MAC) operation takes place. Biquad filter computations use the MAC
operation to maintain precision in the intermediate computational stages.
Figure 7-2. Arithmetic Unit Data Word Structure
To maximize the linear range of the 76-bit ALU, saturation logic is not used. In MAC computations,
intermediate overflows are permitted, and it is assumed that subsequent terms in the computation flow
correct the overflow condition (see Figure 7-3). The DAP memory banks include a dual port data RAM for
storing intermediate results, a coefficient RAM, and a fixed program ROM. Only the coefficient RAM,
assessable via the I2C bus, is available to the user.
Figure 7-3. DSP ALU Operation With Intermediate Overflow
Copyright 2007–2011, Texas Instruments Incorporated
Digital Audio Processor
23
Product Folder Link(s): TAS3204
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS3204PAGR | 功能描述:音频 DSP Hi Perf Dual Core DSP/MCU Aud Proc RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS3208 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DIGITAL AUDIO PROCESSOR WITH ANALOG INTERFACE |
| TAS3208EVM | 功能描述:音频 IC 开发工具 TAS3208EVM Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS3208EVM-LC | 功能描述:音频 IC 开发工具 TAS3208 Low Cost EVM RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS3208IPZP | 功能描述:音频 DSP Dual Core Dig Aud Proc RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
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