l9942 STMicroelectronics, l9942 Datasheet - Page 25

• Manufacturer Part Number: l9942
• Description: Integrated Stepper Motor Driver For Bipolar Stepper Motors With Microstepping And Programmable Current Profile
• Manufacturer: STMicroelectronics

L9942
5.4
Table 17.
5.5
Table 18.
I4 I3 I2 I1 I0
D4 D3 D2 (register4
D7 D6 D5 (register5)
Access
Access
I4 I3 I2 I1 I0
Name
Name
Reset
Reset
(T5 T4 T3)
DT1 DT0
Bit
Bit
NPWM
r w
r w
12
12
I4
I4
0
0
Signal and profile register 3
Signal and profile register 3
The meaning of the different bits is as follows:
Counter and profile (register 4 and register 5)
Counter and profile (register 4 and register 5)
The meaning of the different bits is as follows:
signal PWM.
is set to 0, otherwise pin is in high resistance status.
These bits are loaded in register1 DAC Phase A or B if needed.
These bits are for threshold value in counter of active time during
This bit switches internal PWM signal of bridge A to pin PWM if it
These bits are used in test mode only.
Current profile 5 (7)
r w
r w
11
11
I3
I3
0
0
Current profile 3
) These bits are for threshold value in counter of active time
These bits are loaded needed. in register1 DAC Phase A
or B if needed.
during signal PWM. LSB and next value are set in
register3 by D0 and D1.
r w
r w
10
10
I2
I2
0
0
r w
r w
I1
I1
9
0
9
0
r w
r w
I0
I0
8
0
8
0
D4(7)
PWM counter PWM
(T5)
r w
r w
D1
7
0
7
0
PWM counter
D3(6)
(T4)
r w
r w
D0
6
0
6
0
M(T3)
NPW
D2(5)
r w
r w
5
0
5
0
SPI - Control and status registers
r w
r w
I4
4
0
I4
4
0
Current profile 4 (6)
See also parameter
See also parameter
r w
r w
I3
I3
3
0
3
0
Current profile 2
r w
r w
I2
I2
2
0
2
0
r w
r w
I1
1
0
I1
1
0
Table 12
Table 12
r w
25/40
r w
I0
I0
0
0
0
0