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Motorola DSP56301 user manual Receive Data RXD, Transmit Data TXD, SCI Serial Clock Sclk

Models: DSP56301

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I/O Signals

However, at least one of the three signals must be selected as an SCI signal to release the SCI from reset.

To enable SCI interrupts, program the SCI control registers before any of the SCI signals are programmed as SCI functions. In this case, only one transmit interrupt can be generated because the Transmit Data Register is empty. The timer and timer interrupt operate regardless of how the SCI pins are configured, either as SCI or GPIO.

8.2.1Receive Data (RXD)

This input signal receives byte-oriented serial data and transfers the data to the SCI receive shift register. Asynchronous input data is sampled on the positive edge of the receive clock (1

×SCLK) if the SCI Clock Polarity (SCKP) bit is cleared. RXD can be configured as a GPIO signal (PE0) when the SCI RXD function is not in use.

8.2.2Transmit Data (TXD)

This output signal transmits serial data from the SCI transmit shift register. Data changes on the negative edge of the asynchronous transmit clock (SCLK) if SCKP is cleared. This output is stable on the positive edge of the transmit clock. TXD can be programmed as a GPIO signal (PE1) when the SCI TXD function is not in use.

8.2.3SCI Serial Clock (SCLK)

This bidirectional signal provides an input or output clock from which the transmit and/or receive baud rate is derived in Asynchronous mode and from which data is transferred in Synchronous mode. SCLK can be programmed as a GPIO signal (PE2) when the SCI SCLK function is not in use. This signal can be programmed as PE2 when data is being transmitted on TXD, since the clock does not need to be transmitted in Asynchronous mode. Because SCLK is independent of SCI data I/O, there is no connection between programming the PE2 signal as SCLK and data coming out the TXD signal.

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DSP56301 User’s Manual

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Motorola DSP56301 user manual Receive Data RXD, Transmit Data TXD, SCI Serial Clock Sclk
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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.