在这种方案中，基于DMA移动就不需要数据移位了。
In this scenario, the DMA-based transfer need not shift data later on.
不过此处有性能损失，因为StringBuffer必须透明地增加其大小和对数据移位。
However, there is a performance penalty here, since a StringBuffer must work to transparently increase its size and shift the data around.
在通信协议中，主要实现了双向数据缓冲器、数据移位寄存器、时钟控制电路以及奇偶校验等功能。
The protocol realized some functions, such as two-way data buffer, shift register, clock circuit and parity check.
应用推荐