说明The DS80C320/DS80C323 are fast 80C31/80C32-compatible microcontrollers. Wasted clock and memory cycles have been removed using a redesigned processor core. As a result, every 8051 instruction is executed between 1.5 and 3 times faster than the original for the same crystal speed. Typical applications see a speed improvement of 2.5 times using the same code and same crystal. The DS80C320 offers a maximum crystal rate of 33MHz, resulting in apparent execution speeds of 82.5MHz (approximately 2.5X).
The DS80C320/DS80C323 are pin compatible with all three packages of the standard 80C32 and offer the same timer/counters, serial port, and I/O ports. In short, the devices are extremely familiar to 8051users, but provide the speed of a 16-bit processor.
The DS80C320 provides several extras in addition to greater speed. These include a second full hardware serial port, seven additional interrupts, programmable watchdog timer, power-fail interrupt and reset. The device also provides dual data pointers (DPTRs) to speed block data memory moves. It can also adjust the speed of off-chip data memory access to between two and nine machine cycles for flexibility in selecting memory and peripherals.
The DS80C320 operating voltage ranges from 4.25V to 5.5V, making it ideal as a high-performance upgrade to existing 5V systems. For applications in which power consumption is critical, the DS80C323 offers the same feature set as the DS80C320, but with 2.7V to 5.5V operation.
Designers must have two documents to fully use all the features of this device: this data sheet and the High-Speed Microcontroller User's Guide, available on our website at www.maximintegrated.com/microcontrollers. Data sheets contain pin descriptions, feature overviews, and electrical specifications, whereas our user's guides contain detailed information about device features and operation.
- 8051 Pin and Instruction Set Compatible
- Four 8-Bit I/O Ports
- Three 16-Bit Timer/Counters
- 256 Bytes Scratchpad RAM
- Addresses 64kB ROM and 64kB RAM
- High-Speed Architecture:
- 4 Clocks/Machine Cycle (8032 = 12)
- DC to 33MHz (DS80C320)
- DC to 18MHz (DS80C323)
- Single-Cycle Instruction in 121ns
- Uses Less Power for Equivalent Work
- Dual Data Pointer
- Optional Variable Length MOVX to Access Fast/Slow RAM/Peripherals
- High-Integration Controller Includes:
- Power-Fail Reset
- Programmable Watchdog Timer
- Early Warning Power-Fail Interrupt
- Two Full-Duplex Hardware Serial Ports
- 13 Total Interrupt Sources with Six External
- Available in 40-Pin DIP, 44-Pin PLCC, and 44-Pin TQFP
|Part Number||MCU Core||Core Clock Speed|
|Data Processing||USARTs||Timer Features||Package/Pins||Budgetary|
技术资料用户指南 4827 High-Speed Microcontroller User's Guide
应用笔记 4427 Demonstrating Green Technology with Apples, Oranges, Lemons, and Limes
应用笔记 4335 节能：一叶知秋
应用笔记 4199 从高速微控制器系列向超高速闪存微控制器的升级
应用笔记 3421 Interfacing 8051-based Microcontrollers to an SCI Port
应用笔记 2035 高速8051微控制器：引领成长与创新之路
应用笔记 1087 Micro Tutorial 1: Understanding DC Electrical Characteristics of Microcontrollers
应用笔记 610 Replacing an Atmel TS80C51U2 with a DS80C320/323 Microcontroller
应用笔记 595 8051 Microcontrollers: Frequently Asked Questions
应用笔记 548 Using the High-Speed Micro's Watchdog Timer
应用笔记 137 Using a EconOscillator™ to Clock an 8051 Microprocessor
应用笔记 75 Using the High-Speed Micro's Serial Ports
其它资源高速微控制器用户指南 (PDF, English only)