公开(公告)号：US20140019991A1

公开(公告)日：2014-01-16

申请号：US14028458

申请日：2013-09-16

Applicant: Microchip Technology Incorporated

Inventor： Joseph Julicher ,  Zacharias Marthinus Smit ,  Sean Steedman ,  Vivien Delport ,  Jerrold S. Zdenek ,  Ryan Scott Ellison ,  Eric Schroeder

IPC: G06F9/46

CPC classification number: G06F9/461

Abstract: A microcontroller device has a central processing unit (CPU); a data memory coupled with the CPU divided into a plurality of memory banks, a plurality of special function registers and general purpose registers which may be memory-mapped, wherein at least the following special function registers are memory-mapped to all memory banks a status register, a bank select register, a plurality of indirect memory address registers, a working register, and a program counter high latch; and wherein upon occurrence of a context switch, the CPU is operable to automatically save the content of the status register, the bank select register, the plurality of indirect memory address registers, the working register, and the program counter high latch, and upon return from the context switch restores the content of the status register, the bank select register, the plurality of indirect memory address registers, the working register, and the program counter high latch.

Abstract translation: 微控制器设备具有中央处理单元（CPU）; 与分配到多个存储体中的CPU耦合的数据存储器，可以被存储器映射的多个特殊功能寄存器和通用寄存器，其中至少以下特殊功能寄存器被存储器映射到所有存储体状态 寄存器，存储体选择寄存器，多个间接存储器地址寄存器，工作寄存器和程序计数器高锁存器; 并且其中在出现上下文切换时，所述CPU可操作以自动保存状态寄存器，存储体选择寄存器，多个间接存储器地址寄存器，工作寄存器和程序计数器高锁存器的内容，并且在返回时 从上下文切换恢复状态寄存器，存储体选择寄存器，多个间接存储器地址寄存器，工作寄存器和程序计数器高锁存器的内容。