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參數(shù)資料
| 型號(hào)： | TAS3103IDBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| 封裝： | GREEN, PLASTIC, TSSOP-38 |
| 文件頁(yè)數(shù)： | 98/148頁(yè) |
| 文件大小： | 1247K |
| 代理商： | TAS3103IDBT |
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222
CAUTION: Audio data into the TAS3103 is always treated as signed data.
S
47
40
39
32
31
24
23
22
21
20
19
16
15
8
7
0
Overhead/Guard Bits
16-Bit
Audio
18-Bit
Audio
20-Bit
Audio
24-Bit
Audio
Precision/Noise Bits
32-Bit
Audio
Figure 218. DAP Arithmetic Unit Data Word Structure
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 are
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.
To maximize the linear range of the 76-bit ALU, saturation logic is not used. Intermediate overflows are then permitted
in multiply-accumulate operations, but it is assumed that subsequent terms in the multiply-accumulate computation
flow corrects the overflow condition. The biquad filter structure used in the TAS3103 is the direct form I structure and
has only one accumulation node. With this type of structure, intermediate overflow is allowed as long as the designer
of the filters has assured that the final output is bounded and does not overflow. Figure 219 shows a bounded
computation that experiences intermediate overflow condition. 8-bit arithmetic is used for ease of illustration.
The DAP memory banks include a dual port data RAM for storing intermediate results, a coefficient RAM, a 4K x 16
RAM for implementing the delay stages, and a fixed program ROM. Only the coefficient RAM, assessable via the I2C
bus, is available to the user.
8-Bit ALU Operation
(Without Saturation)
10110111
(73)
73
+ 11001101
(51)
+ 51
10000100
(124)
124
+ 11010011
(45)
+ 45
Rollover
01010111
(57)
169
+ 00111011
(59)
+
59
10010010
(110)
110
Figure 219. DAP ALU Operation With Intermediate Overflow
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TAS3103DBTRG4 | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| TAS3103DBTR | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| TAS3103IDBTRG4 | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| TAS3103IDBTR | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| TAS3103IDCP | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS3103IDBTR | 功能描述:音頻 DSP Digital Audio Processor 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3103IDBTRG4 | 功能描述:音頻 DSP Digital Audio Processor 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3108 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:AUDIO DIGITAL SIGNAL PROCESSORS |
| TAS3108DCP | 功能描述:音頻 DSP 8-Channel Audio DSP 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3108DCPG4 | 功能描述:音頻 DSP 8-Channel Audio DSP 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
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