Microcontroller Design for Wireless Sensor Network in Bio-Medical Application
Date Issued
2010
Date
2010
Author(s)
Wu, Bi-Ru
Abstract
The application of SOC is very wild in the modern society; SOC can condense the area of the whole system. And the concept of wireless sensor network can be used in the long-distance observation system, and the home-health care issue.
In the bio-medical application, the immediately health reaction from sensors carried in people can transmit the warning to the LCC, and then inform the health institution do the immediately action as some dangerous situation. In other situation, the wireless sensor network can be used in the detection for environment, such as some toxic gas and some dangerous chemical compound.
In this these, the design concept is built on wireless sensor network, and the application is based on the sensors we combined into our integrated circuits. In the SOC, we implement this chip by TSMC 2P4M 0.35um standard CMOS process, which we will describe in the Chapter3. This SOC include the analog circuit, including ASK transmitter, OOK receiver, Instrument Amplifier, SAR ADC Converter and Voltage Regulator, and the gas sensor and temperature sensor. And the digital circuit is ASIC microcontroller for the whole system power and state transition control. The wireless sensor network protocol is developed by Dr. Ming-Hui Jin and our lab. The ASIC include the UART, Switch Controller, the Real Time Timer, the FSM and the Power Controller. The operation frequency is usually used in 19.2 kHz for the baud rate to connect the computer.
The programmable microcontroller use two SRAMs to be the program memory and the data memory, one is 2k word, the other is 256 words. The instruction set is referred to the PIC microcontroller developed by Microchip. There are total 35 instructions and the program bus is 14-bit width and the data bus is 8-bit width. The general purpose I/O amounts are 13The programmable microcontroller include two UART, one for RX the other for TX, the watch dog, 3 timers, 8-level stack, and the interrupts of 8 source. The operation frequency is usually used in 4MHz.
Subjects
ASIC
MCU
Type
thesis
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