目录
clkena信号..................................................................................................................................
电路板布局........................................................................................................................................
VCCA & GNDA .............................................................................................................................
VCCD & GND .................................................................................................................................
结论............................................................................................................................................
7–29
7–30
7–31
7–33
7–33
第三节。内存
修订历史.................................................................................................................................... 7-1
第8章的Cyclone II内存块
介绍............................................................................................................................................ 8-1
概观................................................................................................................................................. 8-1
控制信号.................................................................................................................................. 8-3
奇偶校验位支持............................................................................................................................. 8-4
字节使能支持........................................................................................................................ 8-4
盒装模式支持..................................................................................................................... 8-6
地址时钟使能...................................................................................................................... 8-6
内存模式...................................................................................................................................... 8-8
单端口模式.............................................................................................................................. 8-9
简单双端口模式................................................................................................................. 8-10
真正的双端口模式..................................................................................................................... 8-12
移位寄存器模式........................................................................................................................ 8-14
ROM模式...................................................................................................................................... 8-16
FIFO缓冲模式........................................................................................................................... 8-16
时钟模式......................................................................................................................................... 8-16
独立的时钟模式.............................................................................................................. 8-17
输入/输出时钟模式........................................................................................................... 8-19
读/写时钟模式............................................................................................................... 8-22
单时钟模式......................................................................................................................... 8-24
电条件&存储器初始化........................................... ............................. 8-27
读在─写操作在同一地址........................................ ............................ 8-28
同一端口的读 - 在读写模式......................................... ................................................. 8 -28
混合端口读取，在读写模式......................................... ............................................... 8-29
结论............................................................................................................................................ 8-30
参考文献....................................................................................................................... 8-30
第9章外部存储器接口
介绍............................................................................................................................................ 9-1
外部存储器接口标准.............................................. .................................................. 9-2
DDR & DDR2 SDRAM .................................................................................................................... 9-2
QDRII SRAM ..................................................................................................................................... 9-5
旋风DDR II内存支持概述............................................ ........................................ 9-9
数据&数据选通引脚................................................................................................................ 9-10
时钟，命令&地址引脚............................................ .................................................. 9-14
奇偶校验， DM & ECC销................................................................................................................. 9-14
vi
Cyclone II器件手册，卷1
ALTERA [ ALTERA CORPORATION ]
