| 摘要 |
PURPOSE:To eliminate the transfer failure due to mismatching of transfer timing of data between a host system and a magnetic bubble storage element by providing a mechanism, which monitors always the number of data written in a first-in first-out memory (FiFo), to control transfer data. CONSTITUTION:A write permission signal control circuit 5 and a read permission signal control circuit 6 which count the number of data stored in a FiFo 1 and decide the counted value are provided, and a write permission signal WENBL and a read permission signal RENBL are outputted to a write means 3 and a read means 4 at a proper time. Thus, a proper control is performed to prevent overflow of a buffer in the FiFo 1 even in case of mismatching of data transfer timing between a host system H and a memory device, and the transfer failure is eliminated. |
