DS87C550数据手册ADI中文资料规格书

描述 Description

DESCRIPTION
The DS87C550 EPROM High-Speed Micro with A/D and PWM is a member of the fastest 100% 8051-compatible microcontroller family available. It features a redesigned processor core that removes wasted clock and memory cycles. As a result, it executes 8051 instructions up to three times faster than the original architecture for the same crystal speed. The DS87C550 also offers a maximum crystal speed of 33 MHz, resulting in apparent execution speeds of up to 99 MHz.FEATURES
87C52-Compatible
-  8051 pin- and instruction set-compatible
-  Three 16-bit timer/counters
-  256 bytes scratchpad RAM
On-chip Memory
-  8 kbytes EPROM (OTP & Windowed Packages)
-  1 kbyte extra on-chip SRAM for MOVX access
On-chip Analog to Digital Converter
-  Eight channels of analog input, 10-bit resolution
-  Fast conversion time
-  Selectable internal or external reference voltage
Pulse Width Modulator Outputs
-  Four channels of 8-bit PWM
-  Channels cascadable to 16-bit PWM
4 Capture + 3 Compare Registers
55 I/O Port Pins
New Dual Data Pointer Operation
-  Either data pointer can be incremented or decremented
ROMSIZE Feature
-  Selects effective on-chip ROM size from 0 to 8k
-  Allows access to entire external memory map
-  Dynamically adjustable by software High-Speed Architecture
-  4 clocks/machine cycle (8051 = 12)
-  Runs DC to 33 MHz clock rates
-  Single-cycle instruction in 121 ns
-  New Stretch Cycle feature allows access to fast/slow memory or peripherals
Unique Power Savings Modes
EMI Reduction Mode disables ALE when not needed
High integration controller includes:
-  Power-fail reset
-  Early-warning power-fail interrupt
-  Two full-duplex hardware serial ports
-  Programmable watchdog timer
16 total interrupt sources with 6 external

特性 Features

87C52-Compatible
-  8051 pin- and instruction set-compatible
-  Three 16-bit timer/counters
-  256 bytes scratchpad RAM
On-chip Memory
-  8 kbytes EPROM (OTP & Windowed Packages)
-  1 kbyte extra on-chip SRAM for MOVX access
On-chip Analog to Digital Converter
-  Eight channels of analog input, 10-bit resolution
-  Fast conversion time
-  Selectable internal or external reference voltage
Pulse Width Modulator Outputs
-  Four channels of 8-bit PWM
-  Channels cascadable to 16-bit PWM
4 Capture + 3 Compare Registers
55 I/O Port Pins
New Dual Data Pointer Operation
-  Either data pointer can be incremented or decremented
ROMSIZE Feature
-  Selects effective on-chip ROM size from 0 to 8k
-  Allows access to entire external memory map
-  Dynamically adjustable by software High-Speed Architecture
-  4 clocks/machine cycle (8051 = 12)
-  Runs DC to 33 MHz clock rates
-  Single-cycle instruction in 121 ns
-  New Stretch Cycle feature allows access to fast/slow memory or peripherals
Unique Power Savings Modes
EMI Reduction Mode disables ALE when not needed
High integration controller includes:
-  Power-fail reset
-  Early-warning power-fail interrupt
-  Two full-duplex hardware serial ports
-  Programmable watchdog timer
16 total interrupt sources with 6 external