Enhanced Synchronous Serial Interface 0

Table 2-13.Enhanced Synchronous Serial Interface 0 (Continued)

Signal Name

Type

State During

Signal Description

Reset

 

 

 

 

 

 

 

 

 

 

 

SCK0

Input/

Input

Serial Clock—Provides the serial bit rate clock for the ESSI.

 

Output

 

The SCK0 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 C 3—The default configuration following reset is GPIO

PC3

Input or Output

 

input PC3. When configured as PC3, signal direction is

 

 

 

controlled through PRR0. The signal can be configured as an

 

 

 

ESSI signal SCK0 through PCR0.

 

 

 

This signal has a weak keeper to maintain the last state even

 

 

 

if all drivers are tri-stated.

 

 

 

 

SRD0

Input/

Input

Serial Receive Data—Receives serial data and transfers the

 

Output

 

data to the ESSI receive shift register. SRD0 is an input when

 

 

 

data is being received.

 

 

 

Port C 4—The default configuration following reset is GPIO

PC4

Input or Output

 

input PC4. When configured as PC4, signal direction is

 

 

 

controlled through PRR0. The signal can be configured as an

 

 

 

ESSI signal SRD0 through PCR0.

 

 

 

This signal has a weak keeper to maintain the last state even

 

 

 

if all drivers are tri-stated.

 

 

 

 

STD0

Input/

Input

Serial Transmit Data—Transmits data from the serial

 

Output

 

transmit shift register. STD0 is an output when data is

 

 

 

transmitted.

 

 

 

Port C 5—The default configuration following reset is GPIO

PC5

Input or Output

 

input PC5. When configured as PC5, signal direction is

 

 

 

controlled through PRR0. The signal can be configured as an

 

 

 

ESSI signal STD0 through PCR0.

 

 

 

This signal has a weak keeper to maintain the last state even

 

 

 

if all drivers are tri-stated.

 

 

 

 

2-24

DSP56301 User’s Manual

Page 53 Page 55
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Image 54
Motorola DSP56301 user manual SCK0, PC3, SRD0, PC4, STD0, PC5
Page 53 Page 55

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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