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參數(shù)資料
| 型號： | TAS3202PAG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 28/66頁 |
| 文件大?。?/td> | 817K |
| 代理商： | TAS3202PAG |
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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
+
SLES208B – JUNE 2009 – REVISED MARCH 2011
www.ti.com
7.1
DAP Instructions Set
Please see this information in the TAS3xxx DAS Instruction Set Reference Guide, available to those
registered to the TAS3xxx-PurePath Studio Extranet.
7.2
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 MSB 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 ALU 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,
accessible via the I2C bus, is available to the user.
Figure 7-3. DSP ALU Operation With Intermediate Overflow
34
Digital Audio Processor (DAP) Arithmetic Unit
Copyright 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS3202
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS3202PAGR | 功能描述:音頻 DSP Hi Perf Dig Aud SOC RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TAS3204 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:AUDIO DSP WITH ANALOG INTERFACE |
| TAS3204EVM | 功能描述:音頻 IC 開發(fā)工具 TAS3204EVM Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TAS3204EVM-LC | 制造商:Texas Instruments 功能描述:TAS3204EVM EVALUATION MODULE - Boxed Product (Development Kits) |
| TAS3204PAG | 功能描述:音頻 DSP Hi Perf Dual Core DSP/MCU Aud Proc RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
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