I NT R O D U & T I O N  1 Introduction SX-DEV development system offers friendly an easy to use complete development environment for Scenix microcontrollers. he  SX-DEV  development  system  supports  all  currently  available  SX  microcontrollers  from  Scenix Semiconductor, include SX18/20/28A& and SX48/52BD. It uses the SX chip·s built-in debugging capabilities  to  provide  a  low-cost  and  efficient  real-time  emulation  solution.  It  supports  real-time debugging for all SX chips at any user-defined speed up to 100 MHz. It allows users to run the target application in real time, step-by-step or in animate mode, debug source codes and program a target SX device when  design  is  complete.  It  connects  to  the  serial  port  of  any  P&  and  comes  with  complete  integrated development environment. Debugging and programming with SX-DEV is provided via a 6-pin emulation connector which mates with a 6- pin 0.1-inch square post header in the target system. The connector is wired for OS&1, OS&2, VDD, VSS and Reset pins, another one pin used as key. The oscillator circuit components on the target board should not be disconnected as long as the components are within recommended specifications. Features     Real time, full speed execution     Serial port interface     Powered from the target device, less than 5 mA     Voltage range from 3.0V till 5.6 V     Source level support includes SASM, MPASM, Bytecraft SX&, Hitech PI& & and more    Built-in in-system programmer     User-selectable frequency source (quartz, generator, resonator, external source) up to 100 MHz     Step, Run, Run to &ursor, Animate and Break functions     Writes to all registers for code testing &hapter T