DSP56300 Core Functional Blocks, Data ALU

DSP56300 Core Functional Blocks

—Serial Communications Interface (SCI) with baud rate generator

—Triple timer module

—Up to forty-two programmable General Purpose Input/Output (GPIO) pins, depending on which peripherals are enabled

νReduced power dissipation

—Very low power CMOS design

—Wait and Stop low-power standby modes

—Fully-static logic

—Optimized power management circuitry (instruction-dependent,

peripheral-dependent, and mode-dependent)

1.4DSP56300 Core Functional Blocks

The functional blocks of the DSP56300 core are as follows:

Data arithmetic logic unit (ALU)

Address generation unit

Program control unit

PLL and clock oscillator

JTAG TAP and OnCE module

In addition, the DSP56301 provides a set of on-chip peripherals, discussed in Section 1.7, Peripherals, on page 1-12.

1.4.1Data ALU

The data ALU performs all the arithmetic and logical operations on data operands in the DSP56300 core. These are the components of the data ALU:

νFully pipelined 24 × 24-bit parallel multiplier-accumulator

νBit field unit, comprising a 56-bit parallel barrel shifter (fast shift and normalization; bit stream generation and parsing)

νConditional ALU instructions

νSoftware-controllable 24-bit or 16-bit arithmetic support

νFour 24-bit input general-purpose registers: X1, X0, Y1, and Y0

νSix data ALU registers (A2, A1, A0, B2, B1, and B0) that are concatenated into two general-purpose, 56-bit accumulators, A and B, accumulator shifters

νTwo data bus shifter/limiter circuits

1-6	DSP56301 User’s Manual

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.

Motorola DSP56301 user manual DSP56300 Core Functional Blocks, Data ALU

Models: DSP56301

1.4DSP56300 Core Functional Blocks

1.4.1Data ALU

DSP56301 specifications