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参数资料
| 型号： | L9942XP1TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 2.5 A, PDSO24 |
| 封装： | ROHS COMPLIANT, SSOP-24 |
| 文件页数： | 19/40页 |
| 文件大小： | 639K |
| 代理商： | L9942XP1TR |
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SPI - control and status registers
L9942
Doc ID 11778 Rev 6
5.6
Register 6
The meaning of the different bits is as follows:
5.7
Register 7
The meaning of the different bits is as follows:
Table 19.
Register 6
CLR
ST
(PWM)
Filter
Freq.
ST
REF
ERR
Open load
Current profile 8
Bit
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r w
r
r w
Reset
0
Name
CLR6
SST
FT
PWM
Freq.
ST
RREF
Error
Phase
B
Phase
A
I4
I3
I2
I1
I0
I4 I3 I2 I1 I0
These bits are loaded in register1 DAC Phase A or B if needed
See also parameter Table 12
Phase B Phase A
These bits indicate open load at bridges
RREF Error
This bit indicates if reference current is OK (150 A <IREF < 250 A), then is RERR=0.
ST
This bit indicates stall detection.
PWM Freq.
This bit sets frequency of PWM cycle. FRE=1 frequency 20 kHz, FRE=0 frequency 30 kHz
FT
This bit sets filter time in glitch filter. FT=0 TF =1.5 s, FT=1 TF = 2.5 s
SST
This bit specifies output PWM to reflect same logical level like bit ST.
CLR6
This bit resets all read only bits to 0 in register 6.
Table 20.
Register 7
CLR
Temperature
VS monitor
Overcurrent
Bit
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r w
r
Reset
0
Name
CLR7
TSD
TW
OV(W)
UV
HSB2 HSB1
LSB2
LSB1
HSA2
HSA1
LSA2
LSA1
bit7 ... bit0
These bits indicate overcurrent in each low side or highside power transistor.
1
overcurrent failure I > 2 A
OV(W) UV
These bits indicates failure at VS (See also parameter Table 9)
01
Voltage at pin VS is too low.
10
Voltage at pin VS is too high.
TSD TW
These bits indicates temperature failure (See also parameter Table 7)
01
Only for information set at temperature warning threshold.
10
In case of thermal shutdown all bridges are switched off. It has to reset by bit CLR7.
CLR7
This bit resets all bits to 0 in register 7.
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