ES51998(60000counts)
DMM Analog front end/Insulation
2.7 Diode Measurement
MPU send write command to select the diode measurement function.
F3
F2
F1
F0
Measurement mode
Read data bytes
D0(0:18), D1(0:9)
0
1
1
0
Diode mode
Note1: D0/D1 both are binary format. ASIGN/BSIGN are the sign bit of D0/D1, respectively.
Diode measurement mode shares the same configuration with 6.0000V voltage
measurement circuit and support the low-resistance detection. If the STBEEP output (pin64)
is low, it means the low-resistance status is detected (It means the OVX terminal voltage less
than 9mV). It could be faster than the FADC result, so MPU could monitor the STBEEP
output and FADC (D1) data output make the high speed detection for short circuit detection.
Set SHBP=1 to enable the built-in buzzer driving automatically when STBEEP is active.
The default source voltage at diode mode is the same as V+ potential. MPU could set the
control bit EXT=1 to change the source voltage to external source. The external voltage
source (positive or negative) input applied from EXTSRC (pin16). The available external
source range should be from V+ to V-.
ver. 1.7
19
12/01/12
CYRUSTEK [ Cyrustek corporation ]
