L6472 STMICROELECTRONICS [STMicroelectronics], L6472 Datasheet - Page 43

• Manufacturer Part Number: L6472
• Description: dSPIN fully integrated microstepping motor driver
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

L6472
9.1.7
9.1.8
Equation 3
where DEC is the integer number stored in the register and tick is 250 ns.
The available range is from 14.55 to 59590 step/s
When the device is working in infinite acceleration mode this value is ignored.
Any attempt to write the register when the motor is running causes the command to be
ignored and the NOTPERF_CMD flag to rise (see
MAX_SPEED
The MAX_SPEED register contains the speed profile maximum speed expressed in
step/tick (format unsigned fixed point 0.18).
In order to convert it in step/s the following formula can be used:
Equation 4
where MAX_SPEED is the integer number stored in the register and tick is 250 ns.
The available range is from 15.25 to 15610 step/s with a resolution of 15.25 step/s.
MIN_SPEED
The MIN_SPEED register contains the following parameters:
Table 11.
The MIN_SPEED parameter contains the speed profile minimum speed. Its value is
expressed in step/tick and to convert it in step/s the following formula can be used:
Equation 5
where MIN_SPEED is the integer number stored in the register and tick is the ramp 250 ns.
The available range is from 0 to 976.3 step/s with a resolution of 0.238 step/s.
Any attempt to write the register when the motor is running causes the NOTPERF_CMD flag
to rise.
Bit 12
0
Bit 11
MIN_SPEED register
Bit 10
Bit 9
Doc ID 022729 Rev 1
[
[
step
step
Bit 8
[
step
⁄
⁄
s
s
Bit 7
]
]
⁄
=
=
s
]
MAXSPEED
----------------------------------------------------- -
MINSPEED
--------------------------------------------------- -
MIN_SPEED
=
Bit 6
DEC
-------------------------------
2
tick
tick
tick
Section
with a resolution of 14.55 step/s
⋅
Bit 5
2
2
–
⋅
⋅
40
2
2
–
9.1.19).
–
Bit 4
24
18
Bit 3
Programming manual
Bit 2
Bit 1
2
.
Bit 0
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