DS87C550

PRODUCT PREVIEW DS87C550 EPROM High-Speed Micro with A/D and PWM www.dalsemi.com FEATURES § 87C52-Compatible 8051 pin- and instruction set-compatible Three 16-bit timer/counters 256 bytes scratchpad RAM 8 kbytes EPROM (OTP & Windowed Packages) PIN ASSIGNMENT 9 1 61 § On-chip Memory - 10 60 - 1 kbyte extra on-chip SRAM for MOVX access § On-chip Analog to Digital Converter - § Pulse Width Modulator Outputs - Eight channels of analog input, 10-bit resolution Fast conversion time Selectable internal or external reference voltage Four channels of 8-bit PWM Channels cascadable to 16-bit PWM 26 DALLAS DS87C550 § 4 Capture + 3 Compare Registers § 55 I/O Port Pins § New Dual Data Pointer Operation - 44 Either data pointer can be incremented or decremented Selects effective on-chip ROM size from 0 to 8k Allows access to entire external memory map Dynamically adjustable by software 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 1 27 68-Pin PLCC 68-Pin WINDOWED CLCC 80 65 43 § ROMSIZE Feature - § High-Speed Architecture - 64 - § 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 24 DALLAS DS87C550 § 16 total interrupt sources with 6 external Available in 68-p...