精品国产99久久久久久www_亚洲精彩视频在线观看的_性欧美婬妇ⅹxxx视频_里番肉工口全彩老师_a天堂最新在线观看_精品国产在天天在线观看_免费看那种视频_樱桃电视剧全集播放_成人性视频免费看的鲁片_中国伦理影院

INTRODUCTION

The MC68HC901 Multi-Function Peripheral (MFP) is a member of the M68000 Family of peripherals. Unless otherwise specified, the MC68HC901 multi-function peripheral is hereafter referred to as the MFP in this document. Many features of the MFP make reference to the MC68000 Family of 16- and 32-bit microprocessors, which includes the MC68HC000, MC68HC001, and the MC68EC000. These microprocessors are referred to as the MC68000 within this document.

The MFP directly interfaces to the MC68000 via the asynchronous bus structure. Both vectored and polled interrupt schemes are supported with the MFP providing unique vector number generation for each of its 16 interrupt sources. Additionally, handshake lines are provided to facilitate direct memory access controller (DMAC) interfacing. Refer to Figure 1-1 for a block diagram of the MFP.

KEY FEATURES

The MFP performs many of the functions common to most microprocessor-based systems.

The resources available to the user include:

? Eight individually programmable I/O pins with interrupt capability

? 16-source interrupt controller with individual source enable and masking

? Four timers, two of which are multi-mode timers

? Single-channel full-duplex universal synchronous/asynchronous receiver-transmitter(USART) which supports:

— asynchronous formats

— byte synchronous formats, with the addition of a polynomial generator checker

By incorporating multiple functions within the MFP, the system designer retains flexibility while minimizing device count.