abstract.txt

keil-C51完全破解版-28.7M.zip

LPC932 EXAMPLE: 	AUTOCALIBRATION OF INTERNAL LOW POWER OSCILLATOR FOR    
                                 	CLOCKING THE UART
Christian Kulig, 12/06/02


INTRODUCTION:
The LPC932 provides a number of features, which help to reduce power consumption as well as
to minimize external components.

For example, it might be an option for applications in battery powered and handheld devices 
to clock the 礐 with the internal watchdog timer (WDT). (See figure 1)
This lowers the power consumption considerably compared to the use of an external crystal 
or the internal RC oscillator. And of course, there's no need for the crystal and its two 
capacitors anymore. Thus, applications, which don't need a high clock frequency, can be 
developed more economically.


APPLICATION TO THE UART:
Nevertheless, it's possible to achieve a highly accurate time base if required. For example 
to drive the integrated UART, it's necessary to set up a baud rate with a deviation smaller 
than