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參數(shù)資料
| 型號： | L9942XP1TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 2.5 A, PDSO24 |
| 封裝： | ROHS COMPLIANT, SSOP-24 |
| 文件頁數(shù)： | 30/40頁 |
| 文件大?。?/td> | 639K |
| 代理商： | L9942XP1TR |
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Appendix
L9942
Doc ID 11778 Rev 6
Figure 16.
Reference generation for PWM control (switch on)
Register 0
UP/Down
STEP
Count by
1,2,4,8
A0
A1
A2
A3
MUX
A0
A1
A2
0
0 1
23
01
23
01
2 3
Current-Profile Table
stored in register2, ...6
A3=0
Adr
A[3..0]
Phase A
Profile 8
Address Calculation
11
0
Profile 7
Profile 6
Profile 5
Profile 4
Profile 3
01
10
0
Profile 2
00
11
0
Profile 1
00
0
Profile 0
5
A3=1
Adr
neg(A[3..0])
A3=0
Adr
neg(A[3..0])
Phase B
A3=1
Adr A[3..0]
Register 1
9
5
DIR
0
1
0
PhaseCounter
StepMode
SR0
SR1
0
Slew Rate
DM2
DM1
DM0
MUX
0
1
0
1
0
DAC Phase B
DAC Phase A
Decay Mode
5 bit DAC
Phase A
5 bit DAC
Phase B
0
DAC Scale
DAC
Full Scale
REF
I
MAX
I
LIMIT B
I
LIMIT A
I
DI
HS1 on
LS2 on
LS1 on
HS2on
0
1 2 3 4 5 6787 6 5 4 3 2 1 0 1 2 3 456 78 7 6 5432 1
0 1 2 3 4 5 6789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
01 2 3 4 5 6 7 8 7 6 5 432 10 1 2 3456 7
8
7 65 43 2 1
Current Driver A
Current Driver B
STEP Signal
Adress of Current
Profile Entry
Phase A
Phase Counter
Adress of Current
Profile Entry
Phase B
0
95 mA
100mA * 6/31 = 18.4mA
100mA * 30/31 = 91.9mA
200 uA
10
11
0
11
01
0
11
10
1
10
0
1
11
1
A
I
QA1LIM
I
1000
1
Counter value changes after an signal at STEP to next one
depending on selected stepping mode described in figure 3
(e.g. during micro stepping to value 2) .
PWM Control With HS Current Monitoring
Overcurrent Detection At LS Switch
QA1
QA2
+
-
+
HSA1
LIMIT
-
2mA
+
-
2mA
-
+
-
+
LSA2
-
2mA
+
-
2mA
OC
-
B
I
QA2LIM
I
1000
QB1
QB2
+
-
+
LSB1
-
2mA
+
-
2mA
OC
-
+
-
+
HSB2
LIMIT
-
2mA
+
-
2mA
-
HS Current
Monitoring
(Load control)
LS Current
Monitoring
(Overcurrentl)
HS Current
Monitoring
(Load control)
LS Current
Monitoring
(Overcurrent)
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