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參數資料
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: 17/40頁
文件大小: 639K
代理商: L9942XP1TR
SPI - control and status registers
L9942
Doc ID 11778 Rev 6
5.2
Register 1
The meaning of the different bits is as follows:
5.3
Register 2
The meaning of the different bits is as follows:
:
Table 15.
Register 1
Bit
DAC scale
DAC phase B
DAC phase A
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r w
r
Reset
0
Name
DC2
DC1
DC0
BI4
BI3
BI2
BI1
BI0
AI4
AI3
AI2
AI1
AI0
AI4 AI3 AI2 AI1 AI0
These bits control DAC of
bridge A.
Value depends on address and the value of corresponding
current profile.
BI4 BI3 BI2 BI1 BI0
These bits control DAC of
bridge B.
DC2 DC1 DC0
These bits set full scale range
of limit, e.g. 000 for 100 mA or
111 for e.g. 1500 mA
See also parameter Table 12.
Table 16.
Register 2
Bit
Current profile 1
OV
Test only
Current profile 0
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r w
Reset
0
Name
I4
I3
I2
I1
I0
OVW
T1
T0
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
T1 T0
Should be programmed to 0.
-
OVW = 0
In case of an overvoltage event (V-SOV OFF) the outputs are
switched to high impedance state and the Vs Monitor bit OV is
set.
-
OVW = 1
In case of an overvoltage event (V-SOV OFF) the Vs Monitor bit
OV is set. The status of the outputs are unchanged.
-
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