Editing Freescale 683XX

[[File:Ic-photo-Motorola--MC68302FC180-(CPU).jpg|thumb|Motorola MC68302 microcontroller]]
[[File:Motorola 68302 die.JPG|thumb|Motorola MC68302 die]]
[[File:XC68360RC25B.jpg|thumb|XC68360RC25B CPU in PGA]]
{{onesource|date=July 2018}}
The '''Freescale 683xx''' (formerly '''Motorola 683xx''') is a family of compatible [[microcontroller]]s by [[Freescale]] that use a [[Motorola 68000]]-based [[central processing unit|CPU]] core.  The family was designed using a [[hardware description language]], making the parts synthesizable, and amenable to improved fabrication processes, such as die shrinks.

There are two CPU cores used in the 683xx family:  the [[Motorola 68EC000|68EC000]] and the CPU32.  The instruction set of the CPU32 core is similar to the [[Motorola 68020|68020]] without [[bitfield]] instructions, and with a few instructions unique to the CPU32 core, such as table lookup and interpolate instructions, and a low-power stop mode.

The modules of the microcontroller were designed independently and released as new CPUs could be tested. This process let the architects perform "design-ahead" so that when silicon technologies were available, Motorola had designs ready to implement and go to market.  Many of these submodules have been carried forward into the [[Motorola_Coldfire|Coldfire]] line of processors.

The microcontrollers consist of a series of modules, connected by an internal bus:
*A [[dynamic logic (digital logic)#Static versus dynamic logic| fully static]] CPU core, capable of running at any clock speed from dead stop to maximum rated speed (25 or 33&nbsp;MHz).
*A CPU core designed to minimize transistors while maximizing performance.
*A high-speed clocked serial interface for debugging called [[in-circuit emulator|background debug mode]] (BDM).  The 683xx-series was the first to have a clocked serial interface to the CPU to perform debugging.  Now, many CPUs use a standard serial test interface, usually [[JTAG]], for this purpose.
*The SIM (System Integration Module), which eliminates much [[glue logic]] by providing chip selects and address decoding.  The SIM also provides a clock generator, watchdogs for various system operations, configuration of processor pins, a periodic timer, and an interrupt controller.

Other modules available on various processors in the 683xx family are:
*The Timing Processor Unit (TPU), which performs almost any timing related task: timers, counters, proportional pulse width control, pulse width measurement, pulse generation, stepper motor controllers, quadrature detection, etc.  Freescale gives the development system and [[source code|code]] away for free.
*An auxiliary [[random-access memory]] (RAM) doubles as a programmable microcontroller store for the TPU.
*Some early models have two conventional counter-timers.
*A general purpose timer (GPT) module provides pulse accumulators, capture/compare, and [[pulse-width modulation]] capabilities.
*Some models have a [[network interface processor]] in the form of a [[Communication Processor Module|communication processor module]] (CPM) and serial communications controllers (SCC) which can be interfaced to [[Ethernet]] or [[HDLC]] busses.
*Most models have a queued serial module (QSM) which provides both synchronous [[Serial Peripheral Interface]] (SPI), and logic-level [[RS-232]] [[UART]] capabilities.

Motorola announced the 68341 and 68349 processors in 1993. The 68349, known as the ''Dragon I'' was designed to run the [[Magic Cap]] platform from [[General Magic]] for use in personal communicator devices. The 68341 was aimed at home entertainment and educational systems such as the [[Philips]] [[CD-i]] and in low-cost, low-power solutions generally.<ref name="macweek19930524_motorola">{{ cite magazine | url=https://archive.org/details/MacWEEKV07N21/page/n3/mode/1up | title=Motorola post processor plans | magazine=MacWEEK | last1=Norr | first1=Henry | date=24 May 1993 | access-date=6 May 2024 | pages=4 }}</ref>

==See also==
* [[QUICC]] (Quad Integrated Communications Controller)

==References==
{{reflist}}

==External links==
*[https://web.archive.org/web/20131215030355/http://www.freescale.com/webapp/sps/site/taxonomy.jsp?code=DR68K68K683 Freescale M683xx processors]

{{Motorola microcontrollers}}

[[Category:Freescale Semiconductor microcontrollers]]
[[Category:Motorola microcontrollers]]
[[Category:68k microprocessors]]