Description

The DS87C550KCL is a high-speed microcontroller that belongs to the fastest 100% 8051-compatible microcontroller family. It is equipped with a redesigned processor core that eliminates wasted clock and memory cycles. This allows it to execute 8051 instructions up to three times faster than the original architecture for the same crystal speed. With a maximum crystal speed of 33 MHz, the DS87C550KCL offers apparent execution speeds of up to 99 MHz.

Specifications and 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 with eight channels of analog input

- 10-bit resolution for the ADC

- Fast conversion time

- Selectable internal or external reference voltage for the ADC

- Pulse Width Modulator Outputs: Four channels of 8-bit PWM, cascadable to 16-bit PWM

- 4 Capture + 3 Compare Registers

- 55 I/O Port Pins

- New Dual Data Pointer Operation that allows either data pointer to be incremented or decremented

- ROMSIZE Feature: Selects effective on-chip ROM size from 0 to 8k, allowing access to the entire external memory map. The ROMSIZE is dynamically adjustable by software.

- High-Speed Architecture: 4 clocks/machine cycle (8051 = 12), capable of running DC to 33 MHz clock rates. It can execute single-cycle instructions in 121 ns. The Stretch Cycle feature allows access to fast/slow memory or peripherals.

- Unique Power Savings Modes

- EMI Reduction Mode that disables ALE when not needed

- High integration controller that includes Power-fail reset, Early-warning power-fail interrupt, Two full-duplex hardware serial ports, and a Programmable watchdog timer

- 16 total interrupt sources with 6 external

Application Scenarios

The DS87C550KCL is suitable for various applications that require high-speed microcontrollers, such as industrial control systems, robotics, automotive applications, and communication systems.

Comparison

- Faster execution of 8051 instructions

- High-speed architecture with a maximum crystal speed of 33 MHz

- On-chip memory and analog to digital converter for efficient data processing

- Multiple timer/counters and PWM outputs for precise control

- High integration controller with power-fail reset, power-fail interrupt, and serial ports

- Unique power savings modes and EMI reduction feature

- Limited on-chip memory size (8 kbytes EPROM)