阅读:1026回复:0
关于CYPRESS CY7C68013同步读时序!!PDF文档是否正确?在线等
68013同步读的状态机和文档中给出的读逻辑时序,其中SLRD在逻辑时序中高电平和低电平都只有一个时钟宽度,但是如果按照状态机,应该在高电平的时候,不只一个始终宽度啊。
IDLE: When read event occurs, transition to State 1. STATE 1: Point to OUT FIFO, assert FIFOADR[1:0], transition to State 2. STATE 2: Assert SLOE. If FIFO-Empty flag is false (FIFO not empty), transition to State 3 else remain in State 2. STATE 3: Sample data on the bus, increment pointer by asserting SLRD for one IFCLK, de-assert SLOE, transition to State 4. STATE 4: If more data to read, transition to State 2 else transition to IDLE. 首先在状态三的时候de-assert SLOE 是否应该为de-assert SLRD呢?其次大家看它的时序图形:SLRD在最后的占空比是50%,宽度是一个两个时钟周期,是否SLRD的波形应该一直这样呢? 有哪位做过同步读,麻烦告诉我一声啊。谢了 |
|