mdb协议，包含各种终端，自动售货机协议-Version 4.1 of this specification is the fifth release of the international Multi-Drop Bus/ Internal Communication Protocol (MDB/ICP).

C51单片机与售货机外设通讯范例,基于MDB通讯协议。时钟控制等-C51 MCU and peripheral vending machine communication paradigm based MDB protocol.

MDB协议代码（硬币和纸币识别器的协议，代码已经通过测试，可以用于自动售货机）-MDB protocol code (coin and banknote identifier protocol, code has been tested and can be used for vending machines)