L6238 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6238' PDF : 35 Pages View PDF
L6238
Table 6: Phase Delay.
Phase_Dly_2
0
0
0
0
1
1
1
1
Phase_Dly_1
0
0
1
1
0
0
1
1
Phase_Dly_0
0
1
0
1
0
1
0
1
Delay, in
Electrical Degrees
0.0
9.4
18.80
20.68
22.56
24.44 (Default)
26.32
28.20
Table 7: Lock Threshold (Fsys = 10MHz)
Lock_1
0
0
1
1
Lock_0
0
1
0
1
Threshold, in µs
6.4
12.8
25.6
51.2 (Default)
Table 8: Auto-Start Delay.
Auto_Start_Dly_1
0
0
1
1
Auto_Start_Dly_0
0
1
0
1
Delay, in Seconds
90Hz Input
60Hz Input
0.711
1.07
1.422
2.13
2.133
3.2
2.844
4.27 (Default)
Table 9: Status Register.
Status Bit #
0
Signal Name
Control_0
1
Control_1
2
Mask
3
Delay
4
Go
5
Align
Control Function Description
These two bits are a wrap-around of their
corresponding control bits for test purposes.
When the motor controller detects a zero
crossing, Mask will go low and remain low
for 15 electrical degrees after the next
commutation.
Upon detection of a zero crossing, Delay
will go high for a time determined by the
Phase Delay Control bits. After the delay
period, Delay will go low, initiating the next
commutation.
Signifies whether the rotor is in the
alignment phase of start-up or is ramping
up to speed
Separates the align
Log ic
Follows
Control_0
Follows
Control_1
1 = Detect
Bemf
0 = Mask out
Bemf
1 = Delay
0=
Commutation
1 = Run
0 = In Start Up
Default State
0
0
1/0
0/1
1
32/35
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