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What is ROM?

Read-only memory (ROM) is a class of storage media used in computers and other electronic devices. Data stored in ROM cannot be modified (at least not quickly/easily), and it is therefore mainly used to distribute firmware.

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2000-08-29	Interfacing AT25XXX serial EEPROMs with AT89CXX microcontrollers This application note presents a suite of software routines that may be incorporated into a user's application to allow AT89CXX microcontrollers to read from and write to AT25XXX serial EEPROMs.
2000-06-07	Interfacing 93CX6 Serial EEPROMs to PIC16C5X Microcontrollers This application note is intended for design engineers who wish to incorporate a pre-packaged serial EEPROM interface driver into their application.
1999-12-09	Interfacing 64Mb HSDRAM to Motorola's MPC860 processor family The Motorola MPC860 32-bit PowerPC-compatible processors are used for high performance networking and data communications applications. These processors have a 32-bit external memory bus which supports a maximum read and write bandwidth of 200MBps using 7.5ns HSDRAM. The MPC860 has two user programmable memory controller modules called UPMs to eliminate the need for any external memory controller logic. Generally only one UPM is required to support external memory. The other UPM is typically used to control boot ROM or a system peripheral. In addition, the processor has an internal refresh generator, page size registers, and dynamic bus sizing to simplify the interface to HSDRAM devices. The processor is available in 33MHz, 50MHz, and 66MHz clock speed options. This application note describes the 50MHz version and how a 64Mb HSDRAM is interfaced with it.
2000-08-28	Interfacing 24CXX serial EEPROMs This application note presents a suite of software routines that may be incorporated into a user's application to allow an AT89CX051 microcontroller to read and write AT24CXX serial EEPROMs.
2006-02-02	Infineon produces 65nm samples Infineon Technologies has produced first sample chips in its 65nm CMOS platform technology.
2004-05-03	Improving RFID chip security It is important to incorporate measures against attacks in IC card design and implementation, to protect crucial data from illegal use.
1999-10-01	Improving memory access timing in Z182 applications This application note demonstrates the calculations of both ROM and RAM access timing, and provide examples of a conventional processor/memory interface design for V.FAST modem with processing speeds approaching 33MHz.
2000-09-08	Improving memory access timing in Z182 applications This application note demonstrates the calculations of both ROM and RAM access timing, provides examples of a conventional processor/memory interface design, and presents an alternate approach to processor/memory design.
1999-12-22	Image rotation algorithm series 32000 Graphics Fast image rotation of 90 and 270° is important in printer applications, since both portrait and landscape orientation printing may be desired. With a fast image rotation algorithm, only the portrait orientation fonts need to be stored. This, in turn, minimizes ROM storage requirements. This application note shows a fast image rotation algorithm that may be used to rotate an 8 pixel-by-8 line image. Larger image sizes may be rotated by successive application of the rotation primitive.
2014-09-09	How to use TMS320C5515/14/05/04 bootloader Learn about the bootloader and how to interface with it for each of the possible boot devices, as well as instructions for generating a boot-image to store on an external device.
2015-01-29	How to secure the Internet of Things (Part 2) In Part 2 of this series, we will focus on a secure boot, which is the root of trust and the cornerstone of an electronic device's trustworthiness.
2000-06-08	How to get 10 Million Cycles out of your Microchip Serial EEPROM This application note will explain Microchip technology's 10-million cycle guarantee in the context of Total Endurance and the customer application for Serial EEPROMs.
2001-03-22	Generating PROM programming files This application note discusses the structure of PROM data files and shows several ways to create them. Examples using simple languages, such as C and BASIC, as well as PLD development tools such as ABEL and LOG/iC, are likewise discussed.
2008-06-02	Gain from non-volatile memory in flash-based MCUs In the past, many MCUs would use ROM or UV-erasable EPROM to store program instructions. But increasingly, MCUs turn to flash technologies for code storage. The main reason for choosing flash memory is that it can be erased and updated if errors are found in the program code.
2007-02-05	Flash rewrite using EW1 mode (data "FFh" search) This application note shows a data flash rewrite program using the CPR rewrite mode.
2007-02-05	Flash rewrite using EW1 mode This application note shows a data flash rewrite program using the EW1 mode.
1999-10-25	Flash memory PCI add-in card for embedded systems The Flash memory PCI add-in card was created to demonstrate the feasibility of interfacing the Flash memory to the PCI bus in an embedded system. In such a system, Flash memory devices are used for high density and high performance storage for user code and data. This application note describes the Flash memory OCI add-in card.
2005-08-03	EMT opens design center in Bangalore Emerging Memory Technologies Inc. has opened a design center here to support its growing business in Asia-Pacific.
2000-06-07	EEPROM Solutions vs. Parallel Solutions This application note discusses the attributes of serial and parallel memory solutions, conducts a comparative analysis, and, in the process, identifies the benefits and advantages of Serial EEPROMs.
2002-02-25	Dynamic testing of microprocessor based products This application note explains how Geotest's ROM emulation and dynamic I/O devices make a perfect match for testing the most demanding microprocessor-based applications.
2003-11-28	DVD Forum approves portion of new format An HD DVD format proposed by Toshiba Corp. and NEC Corp. as the next-generation DVD format was finally approved by the DVD Forum's steering committee during recent meetings in New York.
2005-10-06	DVD format battle shifts to Japan's CEATEC show Opposing camps in the HD DVD-Blu-ray Disc format battle dug in this Tokyo suburb this week at Japan's largest electronics show, CEATEC, to promote their version of the future of high-definition video.
2006-09-25	Dual-interface MCU features 66Kbyte EEPROM STMicroelectronics unveiled a dual-interface secure microcontroller with 66Kbytes of embedded EEPROM and 224Kbytes of user ROM.
2002-04-16	Developing audio processor hardware with C This technical article describes a new C-based software environment capable of creating high-performance hardware designs in very tight schedules.
2001-01-01	Developing a design methodology for embedded memories Embedding memories into microprocessors present timing, electromigration, and embedded-test challenges. The authors discuss a design methodology that encompasses the entire design flow.
1999-01-01	Designing embedded memories using 4G compilers Embedded memories gain over standalone memories in terms of power consumption, performance, flexibility of use, and test and diagnostics. Use fourth generation compilers to embed memories on a chip to realize the quality and reliability of standalone ones.
2000-06-26	Design of 4Mb Virtual SPROM This application note describes the design of a very low cost, CPLD-based virtual SPROM for downloading programming information to the Xilinx high-density XC4000 Series FPGAs.
2004-06-16	Design and Implementation of an eXpressDSP?compliant DMA Manager for C6X1X This app note describes a C6x1x-optimized (C6211, C6711) ACPY2 library implementation and DMA Resource Manager, which can also be run on C64x devices.
1999-12-01	Delivering digital television to the PC OEMs are looking for a DTVPC solution that has a time-to-market advantage and one that also complies with standards such as ATSC and ARIB.
2002-09-10	CSR Bluetooth solutions eliminate external memory Cambridge Silicon Radio has launched two new BlueCore2 Bluetooth solution devices that are claimed to be the smallest solution to date and eliminate the need for external nonvolatile memory.