发明名称 |
ACHT-BIT-MIKROKONTROLLER MIT RISC-ARCHITEKTUR |
摘要 |
<p>An eight-bit RISC based microcontroller (10) includes an eight-bit register file having a dedicated arithmetic logic unit ALU (ALU-2), in addition to general purpose eight-bit ALU (ALU-1). The register file further includes means for combining a pair of registers (100) to provide a logical sixteen-bit register for directing addressing. The dedicated ALU (ALU-2) is a sixteen-bit ALU which provides certain arithmetic functions for a register pair, thus alleviating the computational burdens that would otherwise be imposed on the general purpose register eight bit ALU (ALU-1). A further feature of the invention is an inclusion of a paging register (RAM X, RAM Y, RAM Z) which is combined with the contents of the logical sixteen-bit register to provide an even greater addressing range. Yet another feature of the eight-bit microcontroller of the present invention is the means for directly reading and writing to any bit position within the register file with a single instruction. This avoids having to perform various loads, shift and/or masking operations needed by prior art microcontrollers.</p> |
申请公布号 |
AT291256(T) |
申请公布日期 |
2005.04.15 |
申请号 |
AT19970913860T |
申请日期 |
1997.10.30 |
申请人 |
ATMEL CORPORATION |
发明人 |
WOLLAN, VEGARD;BOGEN, ALF-EGIL;MYKLEBUST, GAUTE;BRYANT, JOHN, D. |
分类号 |
G06F9/32;G06F9/30;G06F9/302;G06F9/308;G06F9/34;G06F9/355;G06F9/38;G06F13/00;G06F15/78;(IPC1-7):G06F13/00 |
主分类号 |
G06F9/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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