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DDR Quad Read 66MHz and SDR Quad Read 133MHz in the data sheet
There was, but please tell me the difference.
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Hello
The main difference is SDR and DDR. SDR reads the data at the rising edge of the external clock signal.
On the other hand, DDR reads data at the rising and falling edges of the external clock signal at each timing, so data can be simply transferred at twice the speed. However, when considering the actual transfer rate, it is necessary to consider the difference in Clock Rate (MHz) (example: Quad Read 66MHz / 133MHz).
Best Regards
Arai
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Hello
The main difference is SDR and DDR. SDR reads the data at the rising edge of the external clock signal.
On the other hand, DDR reads data at the rising and falling edges of the external clock signal at each timing, so data can be simply transferred at twice the speed. However, when considering the actual transfer rate, it is necessary to consider the difference in Clock Rate (MHz) (example: Quad Read 66MHz / 133MHz).
Best Regards
Arai