PNI MicroMag - Manual (Page 22)

PNI Sensor Corporation DOC# 1015175 r01
MicroMag User Manual – March 2010 Page 22 of 23
Table 5-3: Period Select
Period Select PS2 PS1 PS0
32 0 0 0
64 0 0 1
128 0 1 0
256 0 1 1
512 1 0 0
1024 1 0 1
2048 1 1 0
4096 1 1 1
5.2.3 Magnetic Oscillator Test (MOT)
When set HIGH, MOT causes the magnetic oscillator circuit (selected by AS0
and AS1 in the directions selected by ODIR) to run continuously until the MicroMag
is RESET.
5.2.4 Oscillator Direction (ODIR)
ODIR determines the magnetic oscillator direction if MOT is set to 1. It has no
effect on direction when the MOT bit is set to zero. This is used for debug purposes
only, and will not be set in normal operation.
5.2.5 High Speed Oscillator Test (DHST)
When high, the internal high speed clock is set to drive the DHST pad at ½ the
clock speed. When low, the DHST pad is set to DVDD. This is used for debug
purposes only, and will not be set in normal operation.
5.3 Idle Mode
The MicroMag incorporates an idle mode to reduce power consumption, in which it
automatically goes to sleep when it is not exchanging data or taking a measurement.
However, it does not necessarily initialize in the idle mode at power-up. To ensure the
MicroMag will be in idle mode after being turned on, it is necessary to cycle the system
through one measurement operation.