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Description: 内存的介绍，从最早的内存开始讲起的，直到现在的 DDRII哦-memory, the memory from the earliest start of the 1960s and now the DDRII oh
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Size: 712704 |
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Description: sram 存储器控制程序很完整，值得认真研究，很有帮组-SRAM memory control program is very complete, worthy of serious study, is to help groups
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Size: 23552 |
Author: 许曲 |
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Description: LM3S系列ARM用GPIO模拟并行总线扩展32KB SRAM
PF0～PF7 D0～D7（数据总线）
PA0～PA7 A0～A7（地址总线低8位）
PB0～PB7 A8～A15（地址总线高8位）
PB7 /CE（片选）
PC4 /WE（写使能）
PC5 /OE（读使能）
32KB SRAM 映射在地址0x0000～0x4FFF之间
为了加快访问速度，软件上将采用寄存器方式进行操作
PB7原为/TRST功能，现在也解放出来作为地址线A15-ARM Series LM3S simulation using parallel bus GPIO expansion 32KB SRAM PF0 ~ PF7 D0 ~ D7 (Data Bus) PA0 ~ PA7 A0 ~ A7 (low address bus 8) PB0 ~ PB7 A8 ~ A15 (Address bus high 8 ) PB7/CE (chip select) PC4/WE (Write Enable) PC5/OE (read enable) 32KB SRAM mapped at address 0x0000 ~ 0x4FFF in order to speed up the access between the speed, the way software will be used to operate the register was PB7/TRST function, is also liberated as address line A15
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Size: 119808 |
Author: lsg |
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