略語大辞典 [C] 56 USART universal synchronous/asynchronous 汎用同期非同期受信送信回路. 直列データ通信用のインタフェース回路.universal synchronous/asynchronous receiver-transmitter; an IC(integrated circuit) for serial data communications; e.g. 8251; [C]. 丸善「略語大辞典」JLogosID : 11853340