Sixteen-Bit Compatibility Mode Configuration

3.5Sixteen-Bit Compatibility Mode Configuration

The sixteen-bit compatibility (SC) mode allows the DSP56301 to use DSP56000 object code without change. The SC bit (Bit 13 in the SR) is used to switch from the default 24-bit mode to this special 16-bit mode. SC is cleared by reset. You must set this bit to select the SC mode. The address ranges described in the previous sections apply in the SC mode with regard to the reallocation of X and Y data memory to program memory in MS mode, but the maximum addressing ranges are limited to $FFFF, and all data and program code are 16 bits wide.

3.6Internal Memory Configuration Summary

The RAM configurations for the DSP56301 are listed in Table 3-1.

Table 3-1.DSP56301 RAM Configurations

Bit Settings

 

 

Memory Sizes (in K)

 

 

 

 

 

 

 

MS

 

CE

Program RAM

X data RAM

Y data RAM

Cache

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

4

2

2

0

0

 

1

3

2

2

1

 

 

 

 

 

 

 

1

 

0

2

3

3

0

 

 

 

 

 

 

 

1

 

1

1

3

3

1

 

 

 

 

 

 

 

The actual memory locations for Program RAM and the Instruction Cache in the Program memory space are determined by the MS and CE bits, and their addresses are given in Table

3-2.

Table 3-2.DSP56301 RAM Address Ranges by Configuration

MS

 

CE

 

Program RAM Location

Cache Location

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

 

$000–$FFF

N/A

0

 

1

 

$000–$BFF

$C00–$FFF1

1

 

0

 

$000–$7FF

N/A

 

 

 

 

 

 

1

 

1

 

$000–$3FF

$400–$7FF1

Note: 1.

When enabled, the internal memory location is not accessible and the address range is assigned to external

 

program memory.

 

 

 

 

 

 

 

 

3-6

DSP56301 User’s Manual

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Motorola DSP56301 user manual Sixteen-Bit Compatibility Mode Configuration, Internal Memory Configuration Summary
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DSP56301 specifications

The Motorola DSP56301 is a highly efficient digital signal processor, specifically engineered for real-time audio and speech processing applications. This DSP is part of Motorola's renowned DSP56300 family, which is recognized for its innovative features and outstanding performance in the realm of digital signal processing.

One of the main features of the DSP56301 is its ability to handle complex computations at high speeds. With a maximum clock frequency of 66 MHz, it delivers fast performance, enabling it to process audio signals in real time. The chip is built on a 24-bit architecture, which allows for high-resolution audio processing. This is particularly beneficial in applications such as telecommunications, consumer audio devices, and professional audio equipment, where precision is paramount.

The DSP56301 boasts a comprehensive instruction set that includes efficient mathematical operations, which are essential for digital filters and audio effects processing. One of the key innovations of this device is its dual data path architecture, which permits simultaneous processing of multiple data streams. This feature significantly enhances the device's throughput and responsiveness, making it suitable for demanding applications such as voice recognition and synthesis.

In terms of memory regions, the DSP56301 includes several on-chip memory categories, such as program memory, data memory, and a specialized memory for coefficients. The architecture's support for external memory expansion further increases its versatility, allowing designers to tailor systems to their specific requirements.

The DSP56301 implements advanced features such as a powerful on-chip hardware multiplier and accumulator, simplifying complex mathematical tasks and accelerating the execution of algorithms. Its flexible interrupt system enhances its capability to respond to time-sensitive operations, while the integrated serial ports facilitate efficient data communication with external devices.

Power consumption is also a vital characteristic of the DSP56301. It is designed with energy efficiency in mind, allowing for extended operation in battery-powered devices. The chip’s low power requirements are particularly advantageous in portable audio devices and other applications where energy conservation is crucial.

In conclusion, the Motorola DSP56301 is an exceptional digital signal processor that combines high processing power, flexibility, and efficiency. Its main features, advanced technologies, and robust architecture make it a top choice for developers seeking to create sophisticated audio and signal processing systems. With its enduring legacy in the industry, the DSP56301 continues to be relevant in a variety of modern applications, ensuring it remains a valuable tool for engineers and designers.
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