A Reconfigurable Embedded Microcontroller Systems Research And Design

With the development of economy of China, the processor systems play a more and more important role in many areas recently. Now a novel mixed-signal processor is used widely instead of traditional processor because of its limitation in more and more complex application. The reconfigurable mixed-signal processor involves digital processor block and analog processor block, and can process both digital and analog signals at the same time, with the advantage of high processing speed, high integration density, low power consumption and high reliability. In addition, it also can reconfigure the register and change the function by programming in the work.In the thesis, a Micro-Controller Unit (MCU) is introduced as an important component of mixed-signal processor. First, the system architecture of mixed-signal processor is analyzed and then the whole system of MCU is described in detail.It is composed of self-booting block, MCU core, SRAM and other logic blocks. The codes to be executed can be transported to on-chip SRAM from off-chip EEPROM, processed by the MCU system and generate the corresponding output.Besides, the analysis and design of reconfigurable block which is composed of Serial Peripheral Interface (SPI) and reconfigurable registers are involved. The function of system can be configured via SPI under the control of embedded MCU. The way on how to configure the system dynamically is discussed, too.The system has been fabricated in SMIC 0.18-μm mixed-signal CMOS process, and operates under 1.8V power supply. It occupies an area of 1.06mm2.Measurement results show that all of the instructions are executed correctly and the registers are reconfigured correctly.