Peripherals

1.7Peripherals

In addition to the core features, the DSP56301 provides the following peripherals:

νAs many as 42 user-configurable General-Purpose Input/Output (GPIO) signals

νHost Interface (HI32)

νDual Enhanced Synchronous Serial Interfaces (ESSI0 and ESSI1)

νSerial Communications Interface (SCI)

νTriple timer module

1.7.1General-Purpose Input/Output (GPIO) signals

The GPIO port consists of as many as 42 programmable signals, all of which are also used by the peripherals (HI32, ESSI, SCI, and timer). There are no dedicated GPIO signals. After a reset, the signals are automatically configured as GPIO. Three memory-mapped registers per peripheral control GPIO functionality. Programming techniques for these registers to control GPIO functionality are detailed in Chapter 5, Programming the Peripherals.

1.7.2Host Interface (HI32)

The Host Interface (HI32) is a fast parallel host port up to 32 bits wide that can directly connect to the host bus. The HI32 supports a variety of standard buses and provides glueless connection with a number of industry-standard microcomputers, microprocessors, DSPs, and DMA controllers. In one of its modes of operation, PCI mode, the HI32 is a dedicated bidirectional target (slave) / initiator (master) parallel port with a 32-bit wide data path up to eight words deep. The HI32 can connect directly to the PCI bus.

1.7.3Enhance Synchronous Serial Interface (ESSI)

The DSP56301 provides two independent and identical ESSIs. Each ESSI has a full-duplex serial port for communication with a variety of serial devices, including one or more industry-standard CODECs, other DSPs, microprocessors, and peripherals that implement the Motorola Serial Peripheral Interface (SPI). The ESSI consists of independent transmitter and receiver sections and a common ESSI clock generator. ESSI capabilities include:

νIndependent (asynchronous) or shared (synchronous) transmit and receive sections with separate or shared internal/external clocks and frame syncs

νNormal mode operation using frame sync

νNetwork mode operation with as many as 32 time slots

νProgrammable word length (8, 12, 16, 24, or 32 bits)

νProgram options for frame synchronization and clock generation

νOne receiver and three transmitters per ESSI

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DSP56301 User’s Manual

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Motorola DSP56301 user manual Peripherals, General-Purpose Input/Output Gpio signals, Host Interface HI32
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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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