L6238 데이터 시트보기 (PDF) - STMicroelectronics
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L6238 Datasheet PDF : 35 Pages
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L6238
a)the spindle is stopped.
b)the system is still running at a speed that
allows for resynchronization.
In order to minimize the ramp up time, the micro-
controller has the possibility to:
check the SPIN SENSE pin, (which toggles at
Figure 4: State Diagram
the Bemf zero crossing frequency)
enable the power to the motor based on the
previous information. Otherwise the uP may is-
sue a Brake command, followed by the start-
up procedure after the motor has stopped spin-
ning.
RunBrk = 0
OutEna = 0
SeqInc = X
Fr om Anywhere
Auto Start-up
Enabled
Di sa ble d
B r a ke
W/M ask
Auto/Ext = 0
Hold for
”Align & Go”
RunBrk = 0
&
OutEna = 0
Power
on
Reset
Hold & wait
for decision
ROunuBtErkna==1 0
Hold
for
” R esy nc ”
OutEna = 1
&
RunBr k = 1
Stuck
Rot or
( hold)
Action across
line increments
sequencer
RunBr k = 1
OutEna = 0
Tr i- state
W/M ask
RunBr k = 1
OutEna = 1
Run
W/Mask
SeqInc = 0
SeqInc = 1
SeqInc = 0
SeqInc = 1
Tr i-state
W /Ma sk
RunBrk = 1
OutEna = 0
R un
Wo/ Mas k
RunBrk = 1
OutEna = 1
Hold for
” Align & Go”
OutEna = 1
&
RunBrk = 0
8/35
No Zc
St art
” R esy nc ”
StrRtr = 0
Align = 0
Start
” Align & Go”
No Zc
Resync = 1
Release
min mask
StrRtr = 0
Z(cGReets2entd=Zc)
Run
1
Go =
Align =
Seqncr .
Go = 0
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