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DS80C320-QCD

更新时间： 2024-11-07 04:15:19

品牌	Logo	应用领域
达拉斯 - DALLAS		微控制器
页数	文件大小	规格书
175页	1090K
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High-Speed Microcontroller User Guide

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DS80C320-QCD 数据手册

User’s Guide

….

High-Speed Microcontroller

User Guide

www.dalsemi.com

SECTION 1: INTRODUCTION

The Dallas Semiconductor High-Speed Microcontroller is an 8051-compatible device that provides

improved performance and power consumption compared to the original version. It retains instruction set

and object code compatibility with the 8051, yet performs the same operations in fewer clock cycles.

Consequently, more throughput is possible for the same crystal speed. As an alternative, the High-Speed

Microcontroller can be run slowly to save power. The more efficient design allows a much slower crystal

speed to get the same results as an original 8051, using much less power.

The fundamental innovation of the High-Speed Microcontroller is the use of only four clocks per

instruction cycle compared with twelve for the original 8051. This results in up to 3 times improvement

in performance. In addition, the High-Speed Microcontroller is updated with several new peripherals and

features while providing all of the standard features of an 80C32. These include 256 bytes of on-chip

RAM, 32 I/O ports, three 16-bit timer/counters, and an on-chip UART. All devices provide 256 bytes of

RAM for variables and stack. 128 bytes can be reached using direct addressing and 128 using indirect

addressing.

In addition to improved efficiency, members of the High-Speed Microcontroller family can operate at a

maximum clock rate of 33 or 40 MHz. Combined with the 3 times performance, this allows for a

maximum performance equivalent to a 99 or 120 MHz 8051. This level of computing power is

comparable to many 16-bit processors, but without the added expense and complexity if implementing a

16-bit interface.

A number of peripherals were added to the original 80C32 core when designing the High-Speed

Microcontroller family. Some devices have a programmable watchdog Timer to supervise the system. It

will count up to a user programmable interval and then reset the CPU unless cleared by software. Other

features such as a second, full-function UART and dual data pointers are available to minimize external

interrupts allows greater flexibility in dealing with external events.

Some members of the High-Speed Microcontroller family incorporate Power Management Modes which

allow the device to dynamically vary the internal clock speed from 4 clocks per cycle (default) to 64 or

1024 clocks per cycle. Because power consumption is directly proportional to clock speed, the device

can reduce its operating frequency during periods of little or no activity. This greatly reduces power

consumption. The switch-back feature allows the device to quickly return in divide by 4 mode upon

receipt of an interrupt or serial port activity, allowing the device to respond to external events while in

Power Management Mode.

Various memory configurations are available with the High-Speed Microcontroller family. EPROM and

Mask programmable ROM versions are available for program memory. Some versions incorporate

extended MOVX SRAM on-chip, reducing or eliminating the need for external data memory. This

memory can be made nonvolatile in the DS87C530 through the use of an external lithium battery.

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与DS80C320-QCD相关器件

型号	品牌	获取价格	描述	数据表
DS80C320QCG	MAXIM	获取价格	Microcontroller, 8-Bit, MROM, 8051 CPU, 25MHz, CMOS, PQCC44, PLASTIC, LCC-44
DS80C320-QCG	DALLAS	获取价格	High-Speed/Low-Power Micro
DS80C320-QCG	MAXIM	获取价格	High-Speed/Low-Power Microcontrollers
DS80C320-QCG	ROCHESTER	获取价格	8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQCC44, PLASTIC, LCC-44
DS80C320-QCG/T&R	MAXIM	获取价格	Microcontroller, 8-Bit, MROM, 8051 CPU, 25MHz, CMOS, PQCC44, PLASTIC, LCC-44
DS80C320-QCG+	MAXIM	获取价格	High-Speed/Low-Power Microcontrollers
DS80C320-QCG+T&R	MAXIM	获取价格	Microcontroller, 8-Bit, MROM, 25MHz, CMOS, PQCC44, PLASTIC, LCC-44
DS80C320-QCL	DALLAS	获取价格	High-Speed/Low-Power Micro
DS80C320-QCL	MAXIM	获取价格	High-Speed/Low-Power Microcontrollers
DS80C320-QCL	ROCHESTER	获取价格	8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC44, PLASTIC, LCC-44

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