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公开(公告)号:US20070266225A1
公开(公告)日:2007-11-15
申请号:US11430658
申请日:2006-05-09
申请人: Tak Ko , Yat Cheng , Edward Hathaway , Stephen Pickering , Michael Wood
发明人: Tak Ko , Yat Cheng , Edward Hathaway , Stephen Pickering , Michael Wood
IPC分类号: G06F15/00
CPC分类号: G06F9/35 , G06F9/30098 , G06F9/30145 , G06F9/30149 , G06F9/342 , G06F12/0623 , Y02D10/13
摘要: A microcontroller unit (MCU) includes a CPU, a system integration module (SIM), and a memory. The CPU decodes instructions to determine the function, an addressing type and an operand address, and converts the operand address to a first address. The SIM converts the first address to a memory address. The memory has a first section addressable via a tiny addressing mode and a second section addressable via a short addressing mode. The tiny and short address spaces can be addressed by a single instruction word. The remaining memory locations can be accessed via alternative addressing modes, such as indirect addressing and paging. The first and second memory sections include mapped registers for indirect addressing, index addressing and paging.
摘要翻译: 微控制器单元(MCU)包括CPU,系统集成模块(SIM)和存储器。 CPU解码指令以确定功能,寻址类型和操作数地址,并将操作数地址转换为第一个地址。 SIM将第一个地址转换为内存地址。 存储器具有可通过微小寻址模式寻址的第一部分和通过短寻址模式寻址的第二部分。 可以通过单个指令字来寻址微小的和短的地址空间。 可以通过替代寻址模式(如间接寻址和寻呼)来访问剩余的存储单元。 第一和第二存储器部分包括用于间接寻址,索引寻址和寻呼的映射寄存器。