2、若所有的数据和应用程序存储在HDD里,CPU将经常等待HDD传送数据.SDRAM(同步DRAM)SDRAM支持高速的总线时钟频率(66MHZ以上),而不至于插入指令等待周期,它的基本原理是将CPU和RAM通过一个相同的时钟锁在一起,使得RAM和CPU能够共亨一个时钟周期,以相同的速度同步工作.在理论上其速度与CPU外频同步,与CPU共亨一个时钟...
.SDRAM(同步DRAM)SDRAM支持高速的总线时钟频率(66MHZ以上),而不至于插入指令等待周期,它的基本原理是将CPU和RAM通过一个相同的时钟锁在一起,使得RAM和CPU能够共亨一个时钟周期,以相同的速度同步工作.在理论上其速度与CPU外频同步,与CPU共亨一个时钟周期.以INTEL430VX芯片支持的SDRAM为例,在搭配66.6MHZ的内存数据...
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Each state code represents as follow; S0 = full ON, S3 = suspend to RAM (STR), S4 = suspend to disk (STD), S5 = soft OFF. (See Table 1) STATE S0 S3 S4/S5 S3 HI LO LO Table 1. S3 or S5 Power State Control S5 VREF VDDQ HI ON ON HI ON ON LO OFF OFF(Discharge) VTT...
According to DDR2/3 JEDEC specifications, when the system enters the suspend-to-RAM state the LDO output is left in high impedance while VTTREF and VDDQ are still alive. When the suspend-to-disk state (S3 and S5 tied to ground) is entered, all outputs are actively discharged when either...
Each state code represents as follow; S0 = full ON, S3 = suspend to RAM (STR), S4 = suspend to disk (STD), S5 = soft OFF. (See Table 1) STATE S0 S3 S4/S5 S3 HI LO LO Table 1. S3/S5 Power State Control S5 VREF VDDQ HI ON ON HI ON ON LO OFF OFF(Discharge) VTTREF ...
According to DDR2/3 JEDEC specifications, when the system enters the suspend-to-RAM state the LDO output is left in high impedance while VTTREF and VDDQ are still alive. When the suspend-to-disk state (S3 and S5 tied to ground) is entered, all outputs are actively discharged when either...
Each state code represents as follow; S0 = full ON, S3 = suspend to RAM (STR), S4 = suspend to disk (STD), S5 = soft OFF. (See Table 1.) STATE S0 S3 S4/S5 S3 HI LO LO Table 1. S3/S5 Power State Control S5 VREF VDDQ HI ON ON HI ON ON LO OFF OFF (Discharge) VTTREF...
According to DDR2/3 JEDEC specifications, when the system enters the suspend-to-RAM state the LDO output is left in high impedance while VTTREF and VDDQ are still alive. When the suspend-to-disk state (S3 and S5 tied to ground) is entered, all outputs are actively discharged when either...