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Topic: 68HC11


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In the News (Tue 29 Dec 09)

  
  Семейство микроконтроллеров 68HC11
Первые образцы 8-битового микроконтроллера семейства 68HC11 - одного из наиболее широко используемых в мире электронных устройств - были изготовлены в 1984 году.
Фирмой Motorola выпущено свыше 400 миллионов микроконтроллеров 68HC11 и спрос продолжает возрастать.
68HC11 подтолкнул функционирование 8-битовых микроконтроллеров к уровню 16-битов благодаря своим 16-битовым таймеру, аккумулятору и индексным регистрам.
www.gaw.ru /html.cgi/txt/ic/Motorola/micros/hc11/start.htm   (287 words)

  
 68HC11 - Embedded System Design & Construction
The "one size fits all" 68HC11 is either too small for a given project (not enough pins, for example) or is too big (52-pin package?!) when a much smaller microcontroller would do.
Motorola followed up the 8-bit 68HC11 with the 16-bit 68HC12, which is backwards compatible with the 68HC11 but is a "big" chip in a TQFP package, making it hobbyist-unfriendly.
Perhaps a better migration path from the 68HC11 is Motorola's 8-bit 68HC908 series of microcontrollers.
claymore.engineer.gvsu.edu /egr326/68HC11   (246 words)

  
 68HC11 Assembly
Because the 68HC11 is a special-purpose chip, and all of its memory is etched right on the microprocessor chip itself, its designers had to dedicate portions of its memory to particular functions.
The 68HC11 provides instructions that work on both eight-bit data values (such as the A or B registers or memory bytes) and sixteen-bit data values (such as the X and Y index registers).
Equates are useful so that one does not have to memorize the locations of various 68HC11 control registers; if the registers' names are equated to their locations at the beginning of the code, then one can simply use the labels in programming.
www.owlnet.rice.edu /~elec201/Book/6811_asm.html   (8608 words)

  
 STMicroelectronics | PSD913F2 / 68HC11 DESIGN GUIDE   (Site not responding. Last check: 2007-10-12)
This will produce a demultiplexed 68HC11 address line output from the PSD on pin pa0 that should be routed to the LCD module on the circuit board as shown in the schematic of Figure 4.
To make this division of the memory map possible (that is, common upper half, paged lower half), the 68HC11 initialization firmware must move the internal 68HC11 SRAM and 68HC11 registers from their default location of 0000 hex, to the new location of 8000 hex, as shown in Figure 6.
Note: When the 68HC11 is executing code from the secondary PSD Flash Memory (csboot0 and csboot1), and then it sets the swap bit, it is very important that the 68HC11 firmware linker has set up "synchronized" code in the segment of main PSD Flash Memory (fs7) that replaces the secondary PSD Flash Memory.
www.st.com /stonline/products/literature/an/7897.htm   (7570 words)

  
 GNU Development Chain for 68HC11&68HC12
Welcome to the GNU Development chain for the Motorola 68HC11 & 68HC12 micro-controllers.
Release 2.2 of the GNU Development Chain for 68HC11/68HC12 is available.
New snapshot with 68HC12 far trampoline support and 68HC11 memory paging is available (gcc-3.0.4-m68hc1x-20030216.diffs.gz, binutils-2.12.1-m68hc1x-20030216.diffs.gz).
www.gnu.org /software/m68hc11/m68hc11_port.html   (323 words)

  
 Interrupts on the 68HC11
If your 68hc11 system uses the typical 8 MHz crystal, and your software makes no other changes to the RTI timing subsystem, the 68hc11 is capable of generating an RTI interrupt every 4.096 msecs.
The 68hc11 comes out of reset with all makable interrupts disabled, since the I-bit in the CCR is set.
This is because the 68hc11 always starts up with all maskable interrupts disabled, owing to the initial state of the I-bit in the CCR.
www.seattlerobotics.org /encoder/sep98/interrupts.html   (1498 words)

  
 68HC11 Opcode Map
I also have a good alphabetic listing of the 68HC11 instructions that includes cycle (timing) information and condition-code changes if you want to access the information from that direction.
With an 8-bit number spanning 256 values, it is clear that to implement 311 opcodes requires a scheme using a "special" opcode to indicate that the real opcode is in a different table (called a page).
It is interesting to observe that for the 68HC11 opcode mapping, instead of implementing a single prebyte that specifies to find the opcode on a second page, it implements 3 different prebytes which take us to 3 different auxiliary pages.
home.earthlink.net /~tdickens/68hc11/68hc11_opcode_map.html   (1323 words)

  
 MOTOROLA 68HC11 FAMILY SUPPORT
The sequence for connecting and communicating with the 68HC11 processor is extremely easy.
Once your program exists in the 68HC11 memory, a special option allows you to specify that the EPROM+ software transfer control to a physical address within the processor specified by you.
This is accomplished by performing a JMP to another fixed address within the 68HC11 control program.
www.arlabs.com /motorola.htm   (1195 words)

  
 68HC11 Based Function Generatorby Michael Ellis
Changes to the 68HC11 EEPROM can be programmed directly from the keypad on this instrument without a terminal or computer.
The 68HC11 controls an analog state variable active filter that can be set for lowpass, bandpass, or highpass (2-pole) function with the cutoff frequency controlled by the 68HC11 from 1 Hz to 100 KHz.
The 68HC11 controls circuitry that will measure inductance from 1 microhenry to 0.1 Henries with 1 microhenry accuracy.
michaelgellis.tripod.com /68hc11.html   (210 words)

  
 Motorola 68HC11 Microcontroller
This webpage introduces the inner workings of the 68HC11 microprocessor, and provides some details on the assembly language for the 68HC11.
For Dutch speaking visitors: Ook in Nederland is een leuk 68HC11 bordje te koop: de Simplex3 inclusief nederlandstalige 68HC11 cursus.
This compiler makes it possible to program the 68HC11 in the high level programming language C. The gcc compiler generates ELF output files containing the machine code for your program and DWARF debugger information.
www.hc11.demon.nl /thrsim11/68hc11   (346 words)

  
 68hc11 microcontroller FAQ   (Site not responding. Last check: 2007-10-12)
The 68hc11 is a powerful 8-bit data, 16-bit address microcontroller from Motorola with an instruction set that is similar to the older 68xx (6801, 6805, 6809) parts.
Depending on the variety, the 68hc11 has built-in EEPROM/OTPROM, RAM, digital I/O, timers, A/D converter, PWM generator, and synchronous and ansynchronous communications channels (RS232 and SPI).
Although an eight bit processor, the 68hc11 has some 16 bit instructions (add, subtract, 16 * 16 divide, 8 * 8 mulitply, shift, and rotates).
www.barracudamagazine.com /boss.htm   (372 words)

  
 Embedded Microcontrollers
Stephane Carrez is the moderator of the port of the GNU Development chain for the Motorola 68HC11 and 68HC12 microcontrollers.
Colin Kraft has some stuff on using the 68HC11 in expanded mode and also some info on the 6522 which is a fine interface chip.
Randy's page has links to a dozen 68HC11 C compilers as well as snippets of C code for 68HC11 subsystems such as the SPI.
www.rasmicro.com   (3154 words)

  
 The simple Real Time Java
Motorola 68HC11 was selected because of it's popularity and because it's instruction set (indexed and indexed with offset addressing) allowed to implement Java run-time environment in a relatively small space.
In fact, the Java VM for 68HC11 has been designed to run on its own as a miniature standalone operating system that can execute Java control applications in the multi threaded run-time environment.
The GNU ASxxxx assembler/linker for 68HC11 is recommended as it has been used to build Java VM binaries.
www.rtjcom.com /6811/general.html   (1642 words)

  
 Motorola 68HC11 - Definition, explanation
The Motorola 68HC11 (6811 or HC11 for short) is a microcontroller (µC) family from Motorola, descended from the Motorola 6800 microprocessor, and a subfamily of the 68h family.
The 68HC11 devices are more powerful and more expensive than the 68HC05 microcontrollers, and are used in barcode readers, hotel card key writers, and various other embedded systems.
Internally, the HC11 instruction set is upward compatible with the 6800, with the addition of a Y index register.
www.calsky.com /lexikon/en/txt/m/mo/motorola_68hc11.php   (532 words)

  
 SB-Projects: sbasm, crosses, 68HC11
The Motorola 68HC11 family of microcontrollers is a powerful addition to the 6805 family.
The 68HC11 has a very powerful addressing mode called direct page addressing, which is also called zero page addressing.
The 68HC11 is equipped with a 16-bit stack pointer.
www.sbprojects.com /sbasm/68hc11.htm   (1400 words)

  
 ECE126: 68HC11 Simulator   (Site not responding. Last check: 2007-10-12)
It is useful in simulating experiments involving the Motorola 68HC11 microcontroller.
This is the file for the Motorola 68hc11 simulator.
This is the assembler used to assemble the.asm file to generate the.s19 file,which is then used as the input file for the 68HC11 simulator.
www.cs.missouri.edu /ece2210/hcsim.html   (126 words)

  
 68hc11 DOCUMENTATION
If you know of any books that cover the 68hc11, or if you can provide any details on the books listed here, please send me a note.
The 68hc11 Microcontroller - Joseph D. Greenfield (at R.I.T.) - Saunders College Publishing, (Harcourt Brace Jovanovich) - 1992 - ISBN 0-03-051588-2 - A number of the sections make use of the Buffalo monitor.
Microcontroller Technology, The 68hc11 - Peter Spasov - Prentice Hall - ISBN 0-13-583568-2 Microcontrollers: Architecture, Implementation, & Programming - Kenneth Hintz and Daniel Tabak - McGraw-Hill Inc. 1992 - ISBN 0-07-028977-8 - Covers a wide variety of microcontrollers including: TMS1000, uPD7500, COP400, 6801, 6805, 68HC11, MCS-51, TMS370, MCS-96, 68332, 80960CA, LR33000.
www.esacademy.com /automation/faq/68hc11/5.htm   (451 words)

  
 68HC11 Bit Bang
In my particular situation I have a 68HC11 and what I really needed was a few more serial lines.
From my searching efforts it would appear to me that bit bang code is like a right of passage for the programming Gods and isn’t shared with the rest of us mortals.
The example code was written for a 68hc11, 8 Mhz running in the expanded mode, a PRU and with Buffalo OS.
www.seattlerobotics.org /encoder/200110/Serial6811.htm   (1906 words)

  
 EVBU -- An Open Source 68HC11 Simulator
The Motorola 68HC11 is a popular microcontroller and several evaluation boards are available (including Motorola's original board, known as the EVBU) for exploring the capabilities of this microcontroller.
This software is a 68HC11 simulator that emulates many aspects of an EVBU with a 68HC11 running the BUFFALO monitor program.
The main goal of the EVBU software is to aid in the understanding of the 68HC11 and of various concepts in digital systems.
claymore.engineer.gvsu.edu /~steriana/Python/evbudoc.html   (1956 words)

  
 68HC11 CPU Softmacro
The CPU-internal data path is built up of a structure of multiplexers efficently adapted to the typical data flow of the 68HC11 instructions.
Remark: [1.] The analysis phase of the CPU-internal processes, [2.] the inference of the required ALU functionality, [3.] the development of an appropriate template for the micro instructions regarding the different addressing modes, [4.] and finally the design of the CPU-internal data path took about 40% of the effort for the complete project.
The design offers all of the original 307 instruction opcodes of the 68HC11 and behaves exactly in the same manner as the original 68HC11.
www.riic.at /IP/hc11/hc11.html   (635 words)

  
 68hc11 microcontroller FAQ
After all, I have spent, and continue to spend, a lot of time on this, and the only thing that I intend to gain from it is more information on the 68hc11, and getting to know my fellow 68hc11 groupies better.
2) ABOUT THE 68hc11 2.1) The 68hc11 microcontroller General The 68hc11 is a powerful 8-bit data, 16-bit address microcontroller from Motorola with an instruction set that is similar to the older 68xx (6801, 6805, 6809) parts.
He's everywhere!" - the 68hc11 is not Chicken Man. The 68hc11 - "It's nowhere, it's nowhere!" I remember one episode in which our hero was fighting against an evil plot to steal all of the refrigerator light bulbs in the world.
www.cs.cmu.edu /Groups/AI/html/faqs/ai/microcontroller-faq/68hc11/faq.html   (3474 words)

  
 EMICROS - Downloading Programs to the 68HC11 CANTEC11 Board   (Site not responding. Last check: 2007-10-12)
The 68HC11 is placed into a special mode known as the Bootloader Mode.
The 68HC11 has 4 modes of operation as defined by the MODA and MODB pins.
COM11.BAS is aQuickBasic program used to download the boot.s19 file to the 68HC11 and then program the application into the Flash memory.
www.emicros.com /download.htm   (313 words)

  
 GNU Embedded Libraries for 68HC11 and 68HC12
Welcome to the GNU Embedded Libraries for 68HC11 and 68HC12.
GEL is a collection of embedded libraries and examples for 68HC11 and 68HC12.
Several libraries are general purpose libraries that are or may be ported on various boards.
gel.sourceforge.net   (147 words)

  
 Ada Example for 68HC11 and 68HC12
This example is a simple hello world program written in Ada for 68HC11 boards.
The board is abstracted by the BSP package which provides the information and low level functions to access to the low level devices (IO ports and others).
Several IO ports are strongly typed to enforce the correct association of IO flags and port.
gel.sourceforge.net /ada_example.php   (468 words)

  
 68HC11 Development Board
New development board for the 68HC11 series of Microcontrollers from Motorola.
Board is suitable for use with a number of compilers and is a great learning tool for the 68HC11 series.
The 68HC11 Development Board includes 24kByte of program memory, stored on board in the AT29C010 flash eeprom.
www.futurlec.com /CP68HC11DevBrd.shtml   (212 words)

  
 HI-TECH C compiler and embedded software tools for Freescale Semiconductor's 68HC11   (Site not responding. Last check: 2007-10-12)
for 68HC11 is more than a C compiler - it is a complete development system for C and assembler.
The 68HC11 has a conventional downward growing stack, and a single memory address space, enabling the compiler to implement fully recursive and re-entrant functions.
Optionally, the compiler may be run directly from the command line, allowing you to compile, assemble and link using one command.
www.htsoft.com /products/68hc11c.php   (246 words)

  
 GRNDPLANE, ROBOTS, ROBOT, ELECTRONICS, PROJECT, PROJECTS, HOBBIES, FUN, 68HC11, HOME ROBOT, ROBOTICS, KIT, KITS, DO IT ...
The circuit boards I have been using with the 68HC11 are called the Botboard, and I am using version 1, it is a simple design, and use's all the capabilities of the 68HC11, the only thing it is missing is external memory, which you could add with a daughter board if you wanted too.
BOTBoard is a 2" X 3", single sided printed circuit board designed around the 68HC11 family of microcontrollers.
On the BOTBoard, the 68HC11 is set into single chip mode, and can execute a program from its internal EEPROM or EPROM.
www.geocities.com /grndplane/index.html   (804 words)

  
 Wytec 68HC11 development board/boards: EVBplus2
To change the 68HC11 operating frequency is merely to replace the 8 MHz crystal with a new one.
Many OTP microcontrollers may offer a better solution in a particular application, but their computer architectures and instruction set are not suitable to a general educational purpose.
However, if you have some applications that need to emulate the port B and C in real time and IR remote control, it might be a better idea to pay extra for the plus2 board, not to mention the fact that you would get lot more hardware features.
www.evbplus.com /evbplus2.html   (3021 words)

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