The Motorola (“sixty-eight-oh-nine”) is an 8-bit microprocessor CPU with some bit There were also variants such as the 68A09(E) and 68B09(E); the internal letter . MC Datasheet; Motorola (Freescale); 36 pages; Z80H, A-2, B, 68B09 and the DSP processor, the AD CMOS, 5µs 8-Bit Sampling ADC Data Sheet Submit feedback for this data sheet. EF68B09 datasheet EF68B09 component EF68B09 integrated circuit EF68B09 schematic EF68B09 application note F68B09 68B09 8B09 EF68B0 EF68B EF68 .

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Since a CPU designer could hardly guarantee where this code would be located in a future system, the design focused heavily on support ofcode that could be freely located anywhere in the memory map.

Williams Electronics was an especially prolific user of the processor, which was deployed in arcade hits such as DefenderJoustSinistarand Robotron: The Hitachi was an enhanced version of the with extra registers and additional instructions, including block dataasheet, additional multiply instructions and hardware-implemented division.

Just like the andthe uses a two-phase clock to gate the latches. Simple instructions could therefore execute in as little as two or three such cycles, although this also means that these cycles must be pretty slow. Neither Motorola nor Hitachi produce processors or derivatives anymore.

68B09 – Arcade Chips

Williams also used the processor in many of its solid-state pinball machines; the CPU formed the core of the successful Williams Pinball Controller. Motorola spun off its microprocessor division in The design team believed that future system integrators would look to off-the-shelf code in ROMs to handle common tasks.

The design also focused on supporting reentrant code, code that can be called from various different programs concurrently without concern for coordination between them, or that can recursively call itself.


This is because the Z80 combines two full but short clock cycles into a relatively long memory access period compared to the clock, while the more asynchronous instead has relatively short memory access times: Among the significant enhancements introduced in the were the use of two 8-bit accumulators A and B, which could be combined into a single bit registerDtwo bit index registers X, Y and two bit stack pointers.

A micro-controller version with a slightly modified instruction set, thewas discontinued as late as the second decade of the 21st century. The instruction set and register complement were highly orthogonalmaking the easier to program than the or Since the programmer of a common code module could hardly guarantee where this code would be located in a future system, the design focused heavily on support of position-independent code that can be freely located anywhere in the memory map without modification.

The E was used in thethe3 and 4 computers as an optional alternative to their standardthethe -made home computers clones of the CoCoand the,etc. For yet another datasheeg, Motorola’s official programming manual [3] contains the full listing of assist09a so-called monitora miniature operating system intended to be burned in ROM.

andriashinekimur: How do you know 68b09 datasheet

There were also variants such as the 68A09 E and 68B09 E ; the internal letter indicates the processor’s rated clock speed. Like thethe included an undocumented address bus test instruction which came to be nicknamed Halt and Catch Fire HCF.

As a comparison, the higher resolution state machine of a CPU like the Z80 allowed clock frequencies times as high with the same speed memory chips, which was often the limiting factor.

The latter used the E as their main CPU.

In other projects Wikimedia Commons. In addition to home computers and game consoles, the was also used in a number of arcade games released during the early dataaheet mids.

TSC produced a Unix-like operating system uniFlex which ran only on such machines. How do you know 68b09 datasheet Some Articles: There the MB was dubbed the Peachprobably in ironic reference to the popularity of the. The division changed its name to Freescale and has subsequently been acquired by NXP. The CPU was also used in traffic signal controllers made in the s by several different manufacturers. The industry solved the problem of integrating code modules from multiple separate sources by using automatic relocating linkers and loaders—which is still the solution used today—instead of using relocatable ROM modules.


68b09 datasheet

An example of standard ROM code might be binary floating point arithmetic, which is a common requirement in many systems. However, the decisions made by the design team yielded a very powerful processor and made possible advanced operating systems like OS-9 and UniFlexwhich took advantage of the position-independence, re-entrancy orientated nature of the to create multi-user multitasking operating systems.

Some instructions were replaced by more general ones which the assembler translated into equivalent operations and some were even replaced by addressing modes.

The very first Macintosh prototype, wire-wrapped by Burrell Smithcontained a OS-9 Level II, also took advantage of such memory management facilities. Retrieved 2 April It was a major advance over both its predecessor, the 86b09and the related MOS Technology With little to improve, the marks the end of the evolution of Motorola’s 8-bit processors; Motorola intended that future 8-bit products would be based on an 8-bit data bus version of the the Faster versions were produced later datxsheet Hitachi.

Motorola 6809

Along with theit was also one of the first microprocessors to implement a hardware multiplication instruction, and it features full bit arithmetic and an especially fast interrupt system. Simpson; Raveendran Paramesran From Wikipedia, the free encyclopedia. The had an internal two-phase clock generator needing only an external crystal whereas the E needed an external clock generator.