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| 型號(hào)： | MC68HC000CEI8 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 35/189頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU 16BIT 8MHZ 68-PLCC |
| 標(biāo)準(zhǔn)包裝： | 18 |
| 系列： | M680x0 |
| 處理器類(lèi)型： | M680x0 32-位 |
| 速度： | 8MHz |
| 電壓： | 3.3V，5V |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 68-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 68-PLCC（25x25） |
| 包裝： | 管件 |
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1- 2
M68000 8-/16-/32-BIT MICROPROCESSORS USER’S MANUAL
MOTOROLA
1.1
MC68000
The MC68000 is the first implementation of the M68000 16/-32 bit microprocessor
architecture. The MC68000 has a 16-bit data bus and 24-bit address bus while the full
architecture provides for 32-bit address and data buses. It is completely code-compatible
with the MC68008 8-bit data bus implementation of the M68000 and is upward code
compatible with the MC68010 virtual extensions and the MC68020 32-bit implementation
of the architecture. Any user-mode programs using the MC68000 instruction set will run
unchanged on the MC68008, MC68010, MC68020, MC68030, and MC68040. This is
possible because the user programming model is identical for all processors and the
instruction sets are proper subsets of the complete architecture.
1.2
MC68008
The MC68008 is a member of the M68000 family of advanced microprocessors. This
device allows the design of cost-effective systems using 8-bit data buses while providing
the benefits of a 32-bit microprocessor architecture. The performance of the MC68008 is
greater than any 8-bit microprocessor and superior to several 16-bit microprocessors.
The MC68008 is available as a 48-pin dual-in-line package (plastic or ceramic) and 52-pin
plastic leaded chip carrier. The additional four pins of the 52-pin package allow for
additional signals: A20, A21, BGACK, and IPL2. The 48-pin version supports a 20-bit
address that provides a 1-Mbyte address space; the 52-pin version supports a 22-bit
address that extends the address space to 4 Mbytes. The 48-pin MC68008 contains a
simple two-wire arbitration circuit; the 52-pin MC68008 contains a full three-wire MC68000
bus arbitration control. Both versions are designed to work with daisy-chained networks,
priority encoded networks, or a combination of these techniques.
A system implementation based on an 8-bit data bus reduces system cost in comparison
to 16-bit systems due to a more effective use of components and byte-wide memories and
peripherals. In addition, the nonmultiplexed address and data buses eliminate the need for
external demultiplexers, further simplifying the system.
The large nonsegmented linear address space of the MC68008 allows large modular
programs to be developed and executed efficiently. A large linear address space allows
program segment sizes to be determined by the application rather than forcing the
designer to adopt an arbitrary segment size without regard to the application's individual
requirements.
1.3
MC68010
The MC68010 utilizes VLSI technology and is a fully implemented 16-bit microprocessor
with 32-bit registers, a rich basic instruction set, and versatile addressing modes. The
vector base register (VBR) allows the vector table to be dynamically relocated
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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