UM_6612_044
78M6612 Split-Phase Evaluation Board User Manual
3 Initialization and Calibration
The 78M6613 Split-Phase Firmware includes a relay control routine that initializes the relays in the ‘off’
position. Until relays are turned ‘on’ using the TC0 command, only voltage, line frequency, and chip
temperature can be measured and reported. To globally turn on or off relays with the Split-Phase
Firmware, the following commands should be used.
>TC0 (turn on all relays)
>TC3 (turn off all relays)
The Split-Phase firmware also includes built in calibration routines. Using the precision source method, a
known external voltage source, ambient temperature, and current source (load) is provided to the
evaluation board during calibration by Teridian. The routine automatically adjusts coefficients until
measured values match known (target) values and saves them to flash memory. It is recommended the
user read back and record these calibration coefficients. This will allow the user to re-store the calibration
settings should the firmware for the evaluation board be updated in the future. There are four calibration
coefficients: one for each voltage input and one for each current input. These four coefficients are read
back using the ]8???? command.
Rev. 1.1
17
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
