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參數(shù)資料
| 型號： | TAS3103IDCP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| 封裝： | PLASTIC, HTSSOP-38 |
| 文件頁數(shù)： | 97/148頁 |
| 文件大?。?/td> | 1247K |
| 代理商： | TAS3103IDCP |
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221
Table 25. Four Byte Read Exceptions—Reserved and Factory-Test I2C Subaddresses
SUB-ADDRESS
NUMBER BYTES SUPPLIED BY TAS3103
0xC9
8
0xED
8
NOTE: Table 25 does not include read-only subaddresses and thus does
not include subaddresses 0xFD, 0xFE, and 0xFF. When read, these
read-only subaddresses output 10, 2, and 1 byte respectively.
Thus, for all reserved and factory-test subaddresses, except subaddresses OxC9 and 0xED, the master device must
issue four data received acknowledges for the four bytes of zero-valued data. For subaddresses OxC9 and 0xED,
the master device must issue eight data received acknowledges for the eight bytes of zero-valued data.
Sequential read transactions do not have restrictions on outputting only complete subaddress data sets. If the master
does not issue enough data received acknowledges to receive all the data for a given subaddress, the master device
simply does not receive all the data. If the master device issues more data received acknowledges than required to
receive the data for a given subaddress, the master device simply receives complete or partial sets of data, depending
on how many data received acknowledges are issued from the subaddress(es) that follow.
I2C read transactions, both sequential and random, can impose wait states. For the standard I2C mode
(SCL = 100 kHz), worst-case wait state times for an 8-MHz microprocessor clock is on the order of 2
s. Nominal
wait state times for the same 8-MHz microprocessor clock is on the order of 1
s. For the fast I2C mode (SCL =
400 kHz) and the same 8-MHz microprocessor clock, worst-case wait state times can extend up to 10.5
s in duration.
Nominal wait state times for this same case lie in a range from 2
s to 4.6 s. Increasing the microprocessor clock
frequency lowers the wait state times and for the standard I2C mode, a higher microprocessor clock can totally
eliminate the presence of wait states. For example, increasing the microprocessor clock to 16 MHz results in no wait
states. For the fast I2C mode, higher microprocessor clocks shortens the wait state times encountered, but does not
totally eliminate their presence.
2.4
Digital Audio Processor (DAP) Arithmetic Unit
The digital audio processor (DAP) arithmetic unit is a fixed-point computational engine consisting of an arithmetic unit
and data and coefficient memory blocks. Figure 217 is a block diagram of the arithmetic unit.
76-Bit Adder
Regs
Arithmetic
Engine
Dual Port
Data RAM
Coefficient
RAM
4K x 16
Delay Line
RAM
Program
ROM
DAP
Instruction Decoder/Sequencer
Digital Audio Processor
(DAP)
Arithmetic Unit
Figure 217. Digital Audio Processor Arithmetic Unit Block Diagram
The DAP arithmetic unit is used to implement all firmware functions—soft volume, loudness compensation, bass and
treble processing, dynamic range control, channel filtering, 3D effects, input and output mixing, spectrum analyzer,
VU meter, and dither.
Figure 218 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 8 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| TAS3108DCPR | 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 |
| TAS3108DCPRG4 | 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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