S80C186EC20中文资料英特尔数据手册PDF规格书

INTRODUCTION

Unless specifically noted, all references to the 80C186EC apply to the 80C188EC, 80L186EC, and 80L188EC. References to pins that differ between the 80C186EC/80L186EC and the 80C188EC/80L188EC are given in parentheses. The ‘‘L’’ in the part number denotes low voltage operation. Physically and functionally, the ‘‘C’’ and ‘‘L’’ devices are identical.

■ Fully Static Operation

■ True CMOS Inputs and Outputs

■ Integrated Feature Set:

— Low-Power, Static, Enhanced 8086 CPU Core

— Two Independent DMA Supported UARTs, each with an Integral Baud Rate Generator

— Four Independent DMA Channels

— 22 Multiplexed I/O Port Pins

— Two 8259A Compatible Programmable Interrupt Controllers

— Three Programmable 16-Bit Timer/Counters

— 32-Bit Watchdog Timer

— Ten Programmable Chip Selects with Integral Wait-State Generator

— Memory Refresh Control Unit

— Power Management Unit

— On-Chip Oscillator

— System Level Testing Support (ONCE Mode)

■ Direct Addressing Capability to 1 Mbyte Memory and 64 Kbyte I/O

■ Low-Power Operating Modes:

— Idle Mode Freezes CPU Clocks but Keeps Peripherals Active

— Powerdown Mode Freezes All Internal Clocks

— Powersave Mode Divides All Clocks by Programmable Prescalar

■ Available in Extended Temperature Range (-40°C to +85°C)

■ Supports 80C187 Numerics Processor Extension (80C186EC only)

■ Package Types:

— 100-Pin EIAJ Quad Flat Pack (QFP)

— 100-Pin Plastic Quad Flat Pack (PQFP)

— 100-Pin Shrink Quad Flat Pack (SQFP)

■ Speed Versions Available (5V):

— 25 MHz (80C186EC25/80C188EC25)

— 20 MHz (80C186EC20/80C188EC20)

— 13 MHz (80C186EC13/80C188EC13)

■ Speed Version Available (3V):

— 16 MHz (80L186EC16/80L188EC16)

— 13 MHz (80L186EC13/80L188EC13)