DS87C550

DS87C550 Description

DS87C550 Categories

DS87C550 Manufacturer

DS87C550 Datasheet (PDF)

DS87C550 Price & Availability

DS87C550 Features

• 87C52 Compatible

8051 Pin and Instruction-Set Compatible

Three 16-Bit Timer/Counters

256 Bytes Scratchpad RAM

• On-Chip Memory

8kB EPROM (OTP and Windowed Packages)

1kB 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 (PWM) Outputs

Four Channels of 8-Bit PWM

Channels Cascadable to 16-Bit PWM

• Four Capture Plus Three 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 33MHz Clock Rates

Single-Cycle Instruction in 121ns

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 Six External
• Available in 68-Pin PLCC, 80-Pin PQFP, and 68-Pin Windowed CLCC

DS87C550 Parameters