tmp88ps42ng TOSHIBA Semiconductor CORPORATION, tmp88ps42ng Datasheet - Page 137
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tmp88ps42ng
Manufacturer Part Number
tmp88ps42ng
Description
8 Bit Microcontroller Tlcs-870/x Series
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP88PS42NG.pdf
(226 pages)
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13.3 Position Detection Unit
port. Applied to this position signal input port is the voltage status of the motor windings for the case of sensorless
DC motors or a Hall element signal for the case of DC motors with sensors included. The expected patterns corre-
sponding to specific rotor positions are set in the PMD Output Register (MDOUT) beforehand, and when the input
position signal and the expected value match as the rotation, a position detection interrupt (INTPDC) is generated.
Also, unmatch detection mode is used to detect the direction of motor rotation, where when the status of the position
detection input port changes from the status in which it was at start of sampling, a position detection interrupt is gen-
erated.
in Table 13-2 from the timing chart in Figure 13-2. Once a predicted position signal pattern is set in the MDOUT
register, a position detection interrupt is generated the moment the position signal input port goes to mode indicated
by this expected value. The position signals at each phase in the diagram are internal signals which cannot be
observed from the outside.
The Position Detection Unit identifies the motor's rotor position from input patterns on the position signal input
For three-phase brushless DC motors, there are six patterns of position signals, one for each mode, as summarized
Table 13-2 Position Signal Input Patterns
Detection Mode
Position
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
U Phase (PDU)
H
H
H
L
L
L
Page 127
V Phase (PDV)
H
H
H
L
L
L
W Phase (PDW)
H
H
H
L
L
L
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