National Instruments PC-LPM-16/PnP User Manual page 80

Appendix D Register-Level Programming
Command Register 2
(Continued)
Bit
0
PC-LPM-16/PnP User Manual
Name Description
CALEN Calibration Enable Bit—If this bit is set, the auto-
calibration of the 12 bit ADC is enabled. The power-
on value is 0. To start the auto-calibration, first write
one to this bit, then read this register. The result of the
reading is ignored. An auto-calibration lasts about
10 ms. By checking the CONVPROG bit of the Status
Register, the completion of auto-calibration can be
detected. After the auto-calibration, you must clear
this bit for the A/D conversion operation.
D-8 National Instruments Corporation