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树莓派工程师早就注意到内存问题会限制树莓派的性能，例如 8GB 内存版树莓派速度要比 4GB 内存版树莓派慢些，其原因就是 SDRAM 的自我刷新会消耗 ...

The 32/64-bit PC133 SDRAM Controller” controller handles PC133 SDRAM compatible memory devices attached to a 32 or 64 bit wide data bus. The controller acts as a slave on the AHB bus where ... The ...

One of the problems with being engaged in our hobby or profession is that people assume if you can build a computer out of chips, you must know all the details of their latest laptop computer ...

Over the past 25 years we have seen the transition from SDRAM (Synchronous Dynamic RAM) to DDR (Double Data Rate) SDRAM, and then to DDR2, DDR3 and DDR4 on a cadence of five year cycles. Currently we ...