User guide

LA Stand-Alone Product User Guide
Revision A7
Page 38
7 Appendix B – Firmware Updates
It may become necessary to update the firmware in the controller if a new release of code becomes
available, or if additional features are added. Updates are easily done in the field using a personal
computer with a USB or RS-232 serial interface port and a small application program that sends the
updated code to the controller from the host PC. The controller contains a built-in boot loader that updates
the firmware via the RS-232 or USB interface. This boot loader becomes active when the DSP detects J9
pin 8 (DSP Program) is grounded on power up or reset. In this mode the normal serial interface is
disabled and a special programming interface is activated. Please contact the factory for more detailed
programming instructions.