AN1687中文資料摩托羅拉數(shù)據(jù)手冊(cè)PDF規(guī)格書

INTRODUCTION

This application note describes a full?duplex, wireless data communication link targeted for RS?232 applications.

An encoding technique has been designed which addresses many of the problems incurred when attempting to implement the RS?232 (EIA?232) standard, including but not limited to: hardware flow control, the DC component of the transmitted signal, automatic synchronization from host to slave and error detection. The design emulates a RS?232 null modem cable for computer?to?computer communications.

The actual design was realized with standard SSI logic from the high speed CMOS family (MC74HCxxx), an HC05

based MCU, and Motorolaís ISM Band RF chipset. The targeted data rate was 57,600 Baud, although both higher

and lower data rates are easily attainable. It is expected that most applications would embed the logic functions (and possibly the MCU functions) into a FPGA, CPLD, ASIC, or other LSI logic building block.