SCK1, PD3, SRD1, PD4, STD1, PD5 | Motorola DSP56301 instruction

Enhanced Synchronous Serial Interface 1

Table 2-14.Enhanced Serial Synchronous Interface 1 (Continued)

Signal Name	Type	State During	Signal Description
Signal Name	Type	Reset	Signal Description
		Reset


SCK1	Input/	Input	Serial Clock—Provides the serial bit rate clock for the ESSI.
	Output		The SCK1 is a clock input or output used by both the
			transmitter and receiver in synchronous modes, or by the
			transmitter in asynchronous modes.
			Although an external serial clock can be independent of and
			asynchronous to the DSP system clock, it must exceed the
			minimum clock cycle time of 6T (that is, the system clock
			frequency must be at least three times the external ESSI
			clock frequency). The ESSI needs at least three DSP phases
			inside each half of the serial clock.
			Port D 3—The default configuration following reset is GPIO
PD3	Input or Output		input PD3. When configured as PD3, signal direction is
			controlled through PRR1. The signal can be configured as an
			ESSI signal SCK1 through PCR1.
			This signal has a weak keeper to maintain the last state even
			if all drivers are tri-stated.

SRD1	Input/	Input	Serial Receive Data—Receives serial data and transfers the
	Output		data to the ESSI receive shift register. SRD1 is an input when
			data is being received.
			Port D 4—The default configuration following reset is GPIO
PD4	Input or Output		input PD4. When configured as PD4, signal direction is
			controlled through PRR1. The signal can be configured as an
			ESSI signal SRD1 through PCR1.
			This signal has a weak keeper to maintain the last state even
			if all drivers are tri-stated.

STD1	Input/	Input	Serial Transmit Data—Transmits data from the serial
	Output		transmit shift register. STD1 is an output when data is being
			transmitted.
			Port D 5—The default configuration following reset is GPIO
PD5	Input or Output		input PD5. When configured as PD5, signal direction is
			controlled through PRR1. The signal can be configured as an
			ESSI signal STD1 through PCR1.
			This signal has a weak keeper to maintain the last state even
			if all drivers are tri-stated.

2-26	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 SCK1, PD3, SRD1, PD4, STD1, PD5

Models: DSP56301

Table 2-14.Enhanced Serial Synchronous Interface 1 (Continued)

Signal Name

SCK1

PD3

SRD1

PD4

STD1

PD5

DSP56301 specifications