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Motorola DSP56301 SCI After Reset, SCI Registers After Reset, Reie Sckp Stir Tmie TIE RIE Ilie

Models: DSP56301

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SCI After Reset

8.3SCI After Reset

There are several different ways to reset the SCI:

νHardware RESET signal

νSoftware RESET instruction:

Both hardware and software resets clear the port control register bits, which configure all I/O as GPIO input. The SCI remains in the Reset state as long as all SCI signals are programmed as GPIO (PC2, PC1, and PC0 all are cleared); the SCI becomes active only when at least one of the SCI I/O signals is not programmed as GPIO.

νIndividual reset:

During program execution, the PC2, PC1, and PC0 bits can all be cleared (that is, individually reset), causing the SCI to stop serial activity and enter the Reset state. All SCI status bits are set to their reset state. However, the contents of the SCR remain unaffected so the DSP program can reset the SCI separately from the other internal peripherals. During individual reset, internal DMA accesses to the data registers of the SCI are not valid, and the data is unknown.

νStop processing state reset (that is, the STOP instruction)

Executing the STOP instruction halts operation of the SCI until the DSP is restarted, causing the SCI Status Register (SSR) to be reset. No other SCI registers are affected by the STOP instruction.

Table 8-1illustrates how each type of reset affects each register in the SCI.

Table 8-1.SCI Registers After Reset

Register

Bit Mnemonic

Bit Number

 

Reset Type

 

 

 

 

 

HW Reset

SW Reset

IR Reset

ST Reset

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REIE

16

0

0

—

—

 

SCKP

15

0

0

—

—

 

STIR

14

0

0

—

—

 

TMIE

13

0

0

—

—

 

TIE

12

0

0

—

—

 

RIE

11

0

0

—

—

 

ILIE

10

0

0

—

—

SCR

TE

9

0

0

—

—

 

RE

8

0

0

—

—

 

WOMS

7

0

0

—

—

 

RWU

6

0

0

—

—

 

WAKE

5

0

0

—

—

 

SBK

4

0

0

—

—

 

SSFTD

3

0

0

—

—

 

WDS[2–0]

2–0

0

0

—

—

 

 

 

 

 

 

 

Serial Communication Interface (SCI)

8-5

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Motorola DSP56301 SCI After Reset, SCI Registers After Reset, Reie Sckp Stir Tmie TIE RIE Ilie, Woms RWU Wake SBK Ssftd
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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.