Classification

1. Classified by basic characteristics
This is classified based on the working clock and instruction type of the DSP chip. If a DSP chip can operate normally at any clock frequency within a certain clock frequency range, with no performance degradation except for changes in computing speed, this type of DSP chip is generally referred to as a static DSP chip. For example, OKI Electric's DSP chips and TI's TMS320C2XX series chips belong to this category.

If there are two or more types of DSP chips whose instruction sets and corresponding machine code pin structures are compatible with each other, then these types of DSP chips are called consistent DSP chips. For example, TI's TMS320C54X belongs to this category.

2. Divide by data format
This is classified based on the data format of the DSP chip's operation. DSP chips that work in fixed-point format are called fixed-point DSP chips, such as TI's TMS320C1X/C2X, TMS320C2XX/C5X, TMS320C54X/C62XX series, AD's ADSP21XX series, AT&T's DSP16/16A, Motolora's MC56000, etc. A floating-point DSP chip that operates in floating-point format is called a floating-point DSP chip, such as TI's TMS320C3X/C4X/C8X, AD's ADSP21XXX series, AT&T's DSP32/32C, Motolora's MC96002, etc.

The floating-point format used by different floating-point DSP chips is not exactly the same. Some DSP chips use custom floating-point formats, such as TMS320C3X, while others use IEEE standard floating-point formats, such as Motorola's MC96002, FUJITSU's MB86232, and ZORAN's ZR35325.

3. Classified by purpose

According to the purpose of DSP, it can be divided into general-purpose DSP chips and specialized DSP chips. Universal DSP chips are suitable for ordinary DSP applications, such as TI's series of DSP chips belonging to universal DSP chips. Specialized DSP chips are designed for specific DSP operations and are more suitable for special operations such as digital filtering, convolution, and FFT. Examples of specialized DSP chips include Motorola's DSP56200, Zoran's ZR34881, and Inmos's IMSA100.

Application

DSP chips are widely used in digital control and motion control, including disk drive control, engine control, laser printer control, inkjet printer control, motor control, power system control, robot control, high-precision servo system control, CNC machine tools, etc.

The main applications for low-power, handheld devices, and wireless terminals include mobile phones, PDAs, GPS, and digital radio stations.

Term

·Instruction cycle: the time required to execute an instruction
·TMS320VC5402-100100MHz, 10ns
·MAC time: the time taken for one multiplication and one addition
·FFT execution time: the time required to run an N-point FFT program
·MIPS: Executing millions of instructions per second, TMS320VC5402－100，100MIPS
·MOPS: Executing millions of operations per second
·MFLOPS: executes millions of floating-point operations per second
·BOPS: Executing billions of operations per second

Common chips

1) Power supply: TPS73HD3xx, TPS7333，TPS56100，PT64xx
2) Flash: AM29F400, AM29LV400，SST39VF400
3) SRAM: CY7C1021, CY7C1009, CY7C1049
4) FIFO: CY7C425, CY7C42x5
5) Dual port: CY7C136, CY7C133, CY7C1342
6) SBSRAM: CY7C1329, CY7C1339
7) SDRAM: HY57V651620BTC
8) CPLD: CY37000 series, CY38000 series, CY39000 series
9) PCIe: PCI2040, CY7C09449
10) USB: AN21xx, CY7C68xxx
11) Codec: TLV320AIC23, TLV320AIC10
12) A/D, D/A：ADS7805，TLV2543.
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