如果设置为1，调制解调器将接收数据并存入缓冲区，直到单元同步。
If set to 1, the modem will accept data and buffer it until the unit is synchronized.
重点描述了安全控制单元中杀毒软件的集成和升级，并实现了对缓冲区中数据的病毒扫描。
Mainly describes the integration and the update of anti-virus software on the security control units and realized the virus scanning on data of buffering area.
运算器：运算器是数据加工处理部件，它是由算术逻辑单元(alu)、累加器、数据缓冲器等组成。
Arithmetic unit: arithmetic unit is a data processing unit that consists of arithmetic logic unit (ALU), accumulator, data buffer, ect.
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