Intel P8051 microcontroller. The MCS-51 (commonly termed 8051) is an internally, (CISC), single chip (µC) series developed by in 1980 for use in. Intel's original versions were popular in the 1980s and early 1990s and enhanced derivatives remain popular today. Intel's original MCS-51 family was developed using N-type metal-oxide-semiconductor () technology like its predecessor, but later versions, identified by a letter C in their name (e.g., 80C51) used complementary metal–oxide–semiconductor () technology and consume less power than their NMOS predecessors. This made them more suitable for battery-powered devices. The family was continued in 1996 with the enhanced MCS-151 and the 8// MCS-251 family of binary compatible microcontrollers. While Intel no longer manufactures the MCS-51, MCS-151 and MCS-251 family, enhanced derivatives made by numerous vendors remain popular today.

Some derivatives integrate a (DSP). Beyond these physical devices, several companies also offer MCS-51 derivatives as for use in (FPGA) or (ASIC) designs. Intel D87C51 microcontroller Intel discontinued its MCS-51 product line in March 2007; however, there are plenty of enhanced 8051 products or added regularly from other vendors. The 8051's predecessor, the, was used in the keyboard of the first, where it converted keypresses into the serial data stream which is sent to the main unit of the computer. The 8048 and derivatives are still used today for basic model keyboards.

Serial interrupt programming in 8051 Microcontroller Embedded C Keil Uvision. Embedded System Design Tutorial serial interrupt program using embedded C. The 8051 Serial Port: The 8051 includes an on-chip serial port that can be programmed to operate in one of four different modes and at a range of frequencies.

The 8031 was a reduced version of the original 8051 that had no internal program memory ( (ROM)). To use this chip, external ROM had to be added containing the program that the 8031 would fetch and execute. An 8031 chip could be sold as a ROM-less 8051, as the 8051's internal ROM is disabled by the normal state of the EA pin in an 8031-based design. A vendor might sell an 8051 as an 8031 for any number of reasons, such as faulty code in the 8051's ROM, or simply an oversupply of 8051s and undersupply of 8031s.

The 8052 was an enhanced version of the original 8051 that featured 256 bytes of internal RAM instead of 128 bytes, 8 KB of ROM instead of 4 KB, and a third 16-bit timer. Most modern 8051-compatible microcontrollers include these features. The 8032 had these same features as the 8052 except lacked internal ROM program memory. The 8751 was an 8051 with 4 KB EPROM instead of 4 KB ROM. They were identical except for the non-volatile memory type.

This part was available in a ceramic package with a clear window over the top of the die so could be used to erase the memory. Related parts are: 8752 had 8 KB EPROM, 8754 had 16 KB EPROM, 8758 had 32 KB EPROM. The 80C537 and 80C517 are versions, designed for the. Enhancements mostly include new peripheral features and expanded arithmetic instructions. The 80C517 has fail-safe mechanisms, analog signal processing facilities and timer capabilities and 8 KB on-chip program memory.

Other features include: • 256 byte on-chip RAM • 256 directly addressable bits • External program and data memory expandable up to 64 KB • 8-bit A/D converter with 12 multiplexed inputs • Arithmetic unit can make division, multiplication, shift and normalize operations • Eight data pointers instead of one for indirect addressing of program and external data memory • Extended watchdog facilities • Nine ports • Two full-duplex serial interfaces with own baud rate generators • Four priority level interrupt systems, 14 interrupt vectors • Three power saving modes • Intel MCS-51 •. STC Micro STC89C52 Other ICs or IPs compatible with the MCS-51 have been developed by, Integral, Kristall, and NIIET. Use as intellectual property [ ] Today, 8051s are still available as discrete parts, but they are mostly used as cores. [ ] Available in high-level language source code ( or ) or forms, these cores are typically integrated within embedded systems, in products ranging from to washing machines to complex wireless communication. Designers use 8051 silicon IP cores, because of the smaller size, and lower power, compared to 32 bit processors like, and BA22.

Modern 8051 cores are faster than earlier packaged versions. Design improvements have increased 8051 performance while retaining compatibility with the original MCS 51 instruction set. The original Intel 8051 ran at 12 clock cycles per machine cycle, and most instructions executed in one or two machine cycles. A typical maximum clock frequency of 12 MHz meant these old 8051s could execute one million single-cycle instructions, or 500,000 two-cycle instructions, per second. In contrast, enhanced 8051 silicon IP cores now run at one clock cycle per machine cycle, and have clock frequencies of up to 450 MHz. That means an 8051-compatible processor can now execute 450 million instructions per second.

MCU based on 8051 [ ]. This section needs expansion. You can help. This section needs expansion. You can help. (May 2013) The 80251 8/16/32-bit microcontroller with 16 MB () address-space and 6 times faster instruction cycle was introduced by Intel in 1996.

It can perform as an 8-bit 8051, has 24-bit, an 8-bit ALU, 8-bit instructions, 16-bit instructions, a limited set of 32-bit instructions, 16 8-bit registers, 16 16-bit registers (8 16-bit registers which do not share space with any 8-bit registers, and 8 16-bit registers which contain 2 8-bit registers per 16-bit register), and 10 32-bit registers (2 dedicated 32-bit registers, and 8 32-bit registers which contain 2 16-bit registers per 32-bit register). It features extended instructions – see also the programmer's guide – and later variants with higher performance, also available as intellectual property (IP). It is 3-stage pipelined.

The MCS-251 family was also discontinued by Intel, but is widely available in binary compatible and partly enhanced variants from many manufacturers. See also [ ] • • References [ ].

Proven 8051 Technology for a Wealth of Embedded Applications Extensive Product Portfolio Including Pin-to-Pin Compatibility for End-of-Life Competitive Devices With Atmel's broad range of feature-rich 8-bit microcontrollers (MCUs) based on the 8051 instruction set, you can be assured that your 8051 designs are in good hands. While other suppliers have exited this market, we're committed to extending our roadmap for our proven 8051 MCUs. Whether you're working on legacy, existing or new designs, you’ll get the latest in features and functionality from more than 50 part numbers providing Flash memory ranging from 2KB to 64KB. Choose pin-to-pin compatible members from our 8051 portfolio to replace end-of-life competitive devices. From 8-bit MCUs based on the low-power single-cycle AT89LP core to MCS-51® industry-standard socket drop-in devices and small-footprint 14/16/20/28-pin derivatives, our devices all feature advanced Flash technologies.

Most devices include in-system programming (ISP) for additional usage flexibility. Other options include digital signal processing (DSP) extensions, advanced timer/pulse-width modulation (PWM) peripherals, and CAN and USB interfaces. Our popular AT89LP family delivers the latest in 8051 technology. Its members provide binary-code level compatibility for 80C51-based applications, along with pin-to-pin compatibility to competitive devices ( and ). The AT89LP devices dramatically boost performance by a factor of 6 to 12 times—up to 30MIPS.

Along with modern features and peripherals, you also get low power consumption for your low-voltage and battery-powered applications. To speed development, the AT89LP Developer Studio IDE tool, as well as related documentation and software. Devices Device Family Summary Benefit Applications Technologies Key Parameters. Atmel offers a variety of high performance Flash 8051 microcontrollers featuring in-system programming (ISP). Their integrated Flash memory can be programmed either in parallel mode or in serial mode with the appropriate parallel/ISP software, respectively. They feature a wide range of internal RAM configurations, plus rich features such as interrupt controllers and timer/counters.

Select models feature an A/D converter, Boot Flash memory, and Programmable Counter Arrays. Their highly efficient design can help reduce system power consumption by bringing the clock frequency down to any value — even DC — without loss of data. Software-selectable modes of reduced activity and an 8 bit clock prescaler can further control power consumption. The rich functionality and efficiency of Atmel 8051 Flash ISP microcontrollers make them ideal for applications that need A/D conversion, pulse width modulation, high speed I/O and counting capabilities such as industrial control, consumer goods, alarms, motor control, and more. The Atmel® AT89LP family takes 8051 microcontroller power to a new level.

These high performance 8-bit microcontrollers execute most instructions in a single clock cycle, compared to 12 clock cycles in the classic 8051 CPU. At the same MIPS throughput as the classic 8051, existing applications can use a much lower clock frequency, enabling power consumption reduction by up to 80 percent. Application performance can be boosted up to 20 MIPS throughput — 12 times faster than the traditional 8051 core.

Introduced in 1986, Controller Area Network (CAN) technology was originally intended for automotive engine control communication. It has rapidly gained popularity to support a wide range of growing applications, including medical devices, avionics, factory and industrial automation, and maritime environments. Atmel is well positioned to support CAN networking with a broad portfolio of 8051 microcontroller flash technology, together with extensive experience in CAN networking. For example, the AT89C51CC01, AT89C51CC02, AT89C51CC03 deliver 5 MIPS at 5V, and 16KBytes to 64KBytes Flash.

They can support a wide range of slave applications such as proximity sensor, DeviceNet I/O, textile machine I/O, and many other applications. For low voltage applications, the following controllers maintain up to 3.3MIPS down to 2.7 volts. The AT89C51CC02 with 16Kbytes Flash and 0.5Kbytes RAM + a simple 4 message objects CAN engine packaged into a Small Pin Count package is excellent for low end applications where a minimum DeviceNet or CANopen slave stacks are used.

It is an ideal low cost product for a CAN controller push-button. The AT89C51CC01 features 32Kbytes Flash and 1.2 Kbytes RAM, and is well-positioned for slave applications. It offers 2 Kbytes of Boot flash, with at least 3 MIPS remaining for the application on top of a CANopen or DeviceNet stack. The chip features an 8 channel 10 bit A/D converter, 3 timers, a 5-channel high speed input/output timer units, and 32 I/Os. Its 15 message objects and the 1.2Kbytes RAM make the chip suitable for complex I/O systems. The AT89C51CC03 provides 64Kbytes Flash for application programs and 2Kbytes RAM for a larger object Dictionary. The built-in SPI port also assists communication with other devices.

It features 15 message objects as well as 2Kbytes Bootloader and 2Kbytes EEPROM. Built for today’s increasingly connected applications, Atmel 8051 USB microcontrollers offer powerful interface options that are ideal for devices like Flash recorders, cameras, and cell phones. The AT89C5131A, a popular device in this series, offers an efficient combination of features and performance. Cpanel Whm License Crack.

It combines 32K bytes of Flash memory, 1.2K bytes RAM, 1K EEPROM, 7 USB Endpoints, TWI, SPI, UART, and Programmable Counter Array (PCA). The AT89C5132 is a mass storage device controlling data exchange between various Flash modules, HDD and CD-ROM.

It includes 64K Bytes of Flash memory and allows In-System Programming through an embedded 4K Bytes of Boot Flash Memory. This versatile device provides all the necessary features for man-machine interface including, timers, keyboard port, serial or parallel interface (USB, SPI, IDE), ADC input, I2S output, and all external memory interface (NAND or NOR Flash, SmartMedia, MultiMedia, and DataFlash cards).

Atmel offers a powerful ROMless 8051 microcontroller suitable for existing ROMless applications that require a combination of performance, flexibility, and power efficiency. The AT80C51RD2 microcontroller retains all features of the Atmel 80C52, with 256 bytes of internal RAM, a 7- source 4-level interrupt controller, and three timer/counters. To enhance system performance, this ROMless microcontroller features a programmable counter array, an XRAM of 1024 bytes, a hardware watchdog timer, and a keyboard interface. It also includes a versatile serial channel that facilitates multiprocessor communication (EUART), and a speed improvement mechanism (X2 mode).