GOM-804 & GOM-805 Firmware Update Manual 
4 
INTRODUCTION 
The GOM-804/805 DC Milliohm Meter has upgradable firmware to ensure 
your purchase has a long and useful life with updates and improvements.   
The meter has two microcontrollers that require firmware updates, a master 
microcontroller and a slave microcontroller. The master microcontroller is 
used to control the display, the panel keys and SCPI command parsing. The 
slave controls the relays and ADC operation for the measurement circuits. 
The firmware for each microcontroller must be updated separately and as 
such this manual has a master microcontroller update section and a slave 
microcontroller update section.   
The software used to update each microcontroller is the same 
(LMFlashProgrammer.msi), however the interface used and the procedure to 
update the controllers is slightly different.       
Requirements 
 
  GDM-804 / GDM-805 
  USB cable Type A/B 
  Windows Operating System (XP, Windows 7, 8, 
8.1) 
  Program kit using LM Flash Programmer 
  DFU driver (device firmware upgrade) 
  GOM-804 / 805 Firmware 
MASTER: GOM805_MASTER_*.BIN 
SLAVE: GOM805_SLAVE_*.BIN 
Contact your local distributor for latest firmware.