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Encyclopedia > Freescale 68HC12

The 68HC12 (6812 or HC12 for short) is a 16-bit microcontroller family from Freescale Semiconductor. Originally introduced in the mid 1990s the architecture is an enhancement of the Freescale 68HC11. Programs written for the HC11 are usually compatible with the HC12, which has a few extra instructions. The first 68HC12 derivatives had a maximum bus speed of 8MHz and flash memory sizes up to 128kbytes. In computer science, 16-bit is an adjective used to describe integers that are at most two bytes wide, or to describe CPU architectures based on registers, address buses, or data buses of that size. ... A microcontroller is a computer-on-a-chip optimised to control electronic devices. ... American corporation Freescale Semiconductor, Inc. ... The 68HC11 (6811 or HC11 for short) is a microcontroller (µC) family from Freescale Semiconductor, descended from the Motorola 6800 microprocessor, and a subfamily of the 68h family. ... An instruction set, or instruction set architecture (ISA), describes the aspects of a computer architecture visible to a programmer, including the native datatypes, instructions, registers, addressing modes, memory architecture, interrupt and exception handling, and external I/O (if any). ...


HCS12/MC9S12 derivatives

Beginning in 2000 the family was extended with the introduction of the MC9S12 derivatives which have bus speeds of up to 25MHz and flash sizes up to 512kbytes.


The MC9S12XDP512 which was introduced in 2004 has a bus speed of 40MHz and a peripheral co-processor known as the XGATE which allows for some tasks to be offloaded from the CPU. The CPU of the S12X derivative also features several new instructions to increase performance.


The MC9S12NE64 was introduced by Freescale in September 2004, claiming to be the "industry's first single-chip fast-Ethernet Flash microcontroller." It features a 25 MHz HCS12 CPU, 64K bytes of FLASH EEPROM, 8K bytes of RAM, and an Ethernet 10/100 Mbps controller.


External links


List of Motorola/Freescale microcontrollers

6801/6803 | 6802 | 6804 | 68HC05 | 68HC08 | 68HC11 | 68HC12 | 68HC16 | 683XX (CPU32) | M*CORE | MPC500 | PowerQUICC I/II/III | DSP568XX (DSPcontroller) Image File history File links The M-logo graphic of the Motorola logo, cropped from Image:Motologo. ... Image File history File links Logo graphic part of Freescale Semiconductor logo, cropped from Image:FreescaleSemiconductor. ... The following is a partial list of Motorola products, particularly the companys mobile phones and semiconductors. ... The 68HC11 (6811 or HC11 for short) is a microcontroller (µC) family from Freescale Semiconductor, descended from the Motorola 6800 microprocessor, and a subfamily of the 68h family. ... The Motorola 683XX aka CPU32 is a family of compatible microcontrollers that use a Motorola 68000 CPU core. ... The Motorola 56000 (56k) is a family of DSP chips produced by Motorola from the 1980s on, still continuing to be produced in more advanced models in the 2000s. ...


  Results from FactBites:
 
Freescale 68HC12 - Wikipedia, the free encyclopedia (365 words)
The 68HC12 (6812 or HC12 for short) is a 16-bit microcontroller family from Freescale Semiconductor.
The MC9S12NE64 was introduced by Freescale in September 2004, claiming to be the "industry's first single-chip fast-Ethernet Flash microcontroller." It features a 25 MHz HCS12 CPU, 64K bytes of FLASH EEPROM, 8K bytes of RAM, and an Ethernet 10/100 Mbit/s controller.
Freescale announced the MC9S12XEP100 in May 2006 to further extend the S12X family to 50MHz bus speed and add a Memory protection unit (based on segmentation) and a hardware scheme to provide Emulated EEPROM.
Freescale (334 words)
Freescale had an IPO on July 16, 2004 and is now trading on NYSE under the symbol FSL.
According to general industry data, Freescale Semiconductor was the global market share leader for semiconductors for automotive applications, and had the second largest global market share for microcontrollers and embedded microprocessors.
Freescale's global customer base is comprised of over 10,000 end customers, including over 100 leading original equipment manufacturers served through a direct sales force, as well as several thousand other end customers served through a network of distributors.
  More results at FactBites »


 

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