Đang chuẩn bị liên kết để tải về tài liệu:
Digital design width CPLD Application and VHDL - Chapter 13

Memory Devices and Systems Trong những năm gần đây, bộ nhớ đã trở thành một trong những chủ đề quan trọng nhất trong ngành điện tử kỹ thuật số. Đây là liên hệ chặt chẽ với sự nổi bật ngày càng tăng của bộ vi xử lý giá rẻ và dễ dàng có sẵn chip. Bộ nhớ đơn giản nhất là một thiết bị chúng tôi đã quen thuộc với: D flip-flop. Thiết bị này lưu trữ một bit thông tin duy nhất miễn là cần thiết. Điều này đơn giản khái niệm là ở trung tâm của tất cả các thiết bị bộ. | CHAPTER iiiiiiIỊii3 IIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII Memory Devices and Systems OUTLINE CHAPTER OBJECTIVES 13.1 Basic Memory Concepts 13.2 Random Access Read Write Memory RAM 13.3 Read Only Memory ROM 13.4 Sequential Memory FIFO and LIFO 13.5 Dynamic RAM Modules 13.6 Memory Systems Upon successful completion of this chapter you will be able to Describe basic memory concepts of address and data. Understand how latches and flip-flops act as simple memory devices and sketch simple memory systems based on these devices. Distinguish between random access read write memory RAM and read only memory ROM . Describe the uses of tristate logic in data bussing. Sketch the circuits of static and dynamic RAM cells. Sketch a block diagram of a static or dynamic RAM chip. Describe various types of ROM cells and arrays mask-programmed UV erasable and electrically erasable. Use various types of ROM in simple applications such as digital function generation. Describe the basic configuration of flash memory. Describe the basic configuration and operation of two types of sequential memory first-in-first-out FIFO and last-in-first-out LIFO . Describe how dynamic RAM is configured into high capacity memory modules. Sketch a basic memory system consisting of several memory devices an address and a data bus and address decoding circuitry. Represent the location of various memory device addresses on a system memory map. Recognize and eliminate conditions leading to bus contention in a memory system. Expand memory capacity by parallel bussing and CPLD-based decoding. 621 622 CHAPTER 13 Memory Devices and Systems In recent years memory has become one of the most important topics in digital electronics. This is tied closely to the increasing prominence of cheap and readily available microprocessor chips. The simplest .