数字电子技术(课件)lec.ppt
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1、2023/11/14,Chapter 10 Memory and Storage,1,Lecture 24 Outline,10-5Flash Memories10-6Memory Expansion10-7Special Types of Memories*Memory Application,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,2,Key Knowledge in Lecture 24,Operation principle of flash memory.Memo
2、ry word-length expansion and word capacity expansion connection.Determine the address range for each memory chip.FIFO memories and their application.LIFO memories and their use as stack,Difficult Topics:Memory expansion method;Determine the address range of memory chip.,Lecture 24:Memory Expansion,A
3、pplication,2023/11/14,Chapter 10 Memory and Storage,3,The Storage Cell in a Flash Memory,Flash memories are high-density read/write nonvolatile memories.The storage cell consists of a single floating gate MOS transistor.,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storag
4、e,4,Simplified Illustration of Storing a 0 or a 1,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,5,The Read Operation of a Flash Cell in An Array,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,6,Simplified Illustration of Removing C
5、harge from a Cell,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,7,Basic Flash Memory Array,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,8,Two Types of Memory Expansion,Lecture 24:Memory Expansion,Application,Word-length expansion
6、:expand the number of bits in each address.,2023/11/14,Chapter 10 Memory and Storage,9,Memory Expansion Example 1,Lecture 24:Memory Expansion,Application,Expand the 64k x 4 ROM to form a 64k x 8 ROM.,2023/11/14,Chapter 10 Memory and Storage,10,Memory Expansion Example 1 Solution,Lecture 24:Memory Ex
7、pansion,Application,2023/11/14,Chapter 10 Memory and Storage,11,Memory Expansion Example 2 and the Solution,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,12,RAM Word-Length Expansion Illustration,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory
8、and Storage,13,RAM Word-Length Expansion Example,Lecture 24:Memory Expansion,Application,Use 1M x 4 SRAM to create a 1M x 8 SRAM.,2023/11/14,Chapter 10 Memory and Storage,14,Two Types of Memory Expansion,Lecture 24:Memory Expansion,Application,2.Word-capacity expansion:expand the number of different
9、 addresses.,2023/11/14,Chapter 10 Memory and Storage,15,Word-Capacity Expansion Example 1,Use 512k x 4 RAMs to implement a 1M x 4 memory.,Lecture 24:Memory Expansion,Application,How to expand memory with more than two chips?,2023/11/14,Chapter 10 Memory and Storage,16,Word-Capacity Expansion Example
10、 2,Lecture 24:Memory Expansion,Application,Use 8k x 8 RAMs to implement a 32k x 8 memory.,2023/11/14,Chapter 10 Memory and Storage,17,Determine the Address Range of Each Memory Chip,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,18,Memory Modules,Lecture 24:Memory E
11、xpansion,Application,2023/11/14,Chapter 10 Memory and Storage,19,Inserting a SIMM/DIMM into a Socket,Lecture 24:Memory Expansion,Application,SIMM has 32-bit data path,DIMM has 64-bit data path.,2023/11/14,Chapter 10 Memory and Storage,20,Special Types of Memories,Lecture 24:Memory Expansion,Applicat
12、ion,First in-First out(FIFO)Memories,2023/11/14,Chapter 10 Memory and Storage,21,Block Diagram of a Typical FIFO Serial Memory,Lecture 24:Memory Expansion,Application,2023/11/14,Chapter 10 Memory and Storage,22,FIFO Register in Data-Rate Buffering Applications,Lecture 24:Memory Expansion,Application
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