The XC226x DERIVATIVES are high-performance members of the Infineon XC2000 Family
of full-feature single-chip CMOS microcontrollers. These devices extend the functionality
and performance of the C166 Family in terms of instructions (MAC unit), peripherals, and
speed. They combine high CPU performance (up to 80 million instructions per second)
with extended peripheral functionality and enhanced IO capabilities. Optimized
peripherals can be adapted flexibly to meet the application requirements. These
DERIVATIVES utilize clock generation via PLL and internal or external clock sources. Onchip
memory modules include program Flash, program RAM, and data RAM.
WALSH CODES AND THEIR
DERIVATIVES
- INTRODUCTION
- WALSH FUNCTIONS DEFINITION AND PROPERTIES
- WALSH FUNCTION GENERATING
- WALSH FUNCTIONS USED WITHIN THE IS-95 SYSTEM
- WALSH FUNCTIONS USED WITHIN THE CDMA2000 SYSTEM
This collection of circuits was worked out between June1991 and July of 1994. Most were designed at customerrequest or are DERIVATIVES of such efforts. All representsubstantial effort and, as such, are disseminated here forwider study and (hopefully) use.1 The examples areroughly arranged in categories including power conversion,transducer signal conditioning, amplifiers and signalgenerators. As always, reader comment and questionsconcerning variants of the circuits shown may be addresseddirectly to the author.
The solution presented in this paper and in the attached source files emulates the mostimportant SSC functions by using SW routines implemented in C. The code is focused onthe SAB C513, but will fit to all C500 DERIVATIVES.Beyond the low level software drivers a test shell is delivered. This shell allows a quicktest of the software drivers by an emulator or a starter kit demo board.
This m-file displays the time waveform for the Gaussian pulse function and the first and second DERIVATIVES of the Gaussian pulse function for a 0.5 nanosecond pulse width. Other values of pulse widths may be used by changing fs,t,t1. The program uses the actual first and second derivative equations for the Gaussian pulse waveforms. The first derivative is considered to be the monocycle or monopulse as discussed in most papers. The second derivative is the waveform generated from a dipole antenna used in a UWB system. Other information is contained in the file.
These routines transmit and receive serial data using two general
* I/O pins, in 8 bit, No parity, 1 stop bit format. They are useful
* for performing serial I/O on 8051 DERIVATIVES not having an
* internal UART, or for implementing a second serial channel.
