
MOTOR CONTROLLER (Cont’d)
F. igure 73. Chronogram of Events (in Autoswitched Mode)
CH event
ZH or ZS event
DH event
DS event
Cn processing
Wait for Cn
Wait for Dn
Wait for Z
T
Zn
Dn
Cn
Voltage on phase A
Voltage on phase B
Voltage on phase C
P signal when sampled
(Output of the
analog MUX)
VDD
VREF
(Threshold value for
VSS
Input comparator)
ST7MC1xx/ST7MC2xx
t
BEMF
sampling
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