L6470H STMicroelectronics, L6470H Datasheet - Page 39

• Manufacturer Part Number: L6470H
• Description: Motor / Motion / Ignition Controllers & Drivers 8 - 45V 7.0A 1/128 Microstepping SPI
• Manufacturer: STMicroelectronics
• Type: Micro Stepping Motor Driverr
• Series: -r

Specifications of L6470H

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 8 V to 45 V
• Supply Current: 0.5 mA
• Mounting Style: SMD/SMT
• Package / Case: HTSSOP-28
• Operating Temperature: - 40 C to + 125 C
• Applications: Stepper Motor Driver, 2 Phase
• Evaluation Tools: *
• Number Of Outputs: 1
• Current - Output: 3A
• Voltage - Load: 8 V ~ 45 V
• Voltage - Supply: 3.3V, 5V
• Mounting Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6470
9.1.6
9.1.7
9.1.8
DEC
The DEC register contains the speed profile deceleration expressed in step/tick
unsigned fixed point 0.40).
In order to convert DEC value in step/s
Equation 6
where DEC is the integer number stored into the register and tick is 250 ns.
The available range is from 14.55to 59590 step/s2 with a resolution of 14.55 step/s2.
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 paragraph
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 7
where MAX_SPEED is the integer number stored into 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 following parameters:
Table 10.
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:
LSPD_OPT
Bit 12
MIN_SPEED register
Bit 11
Bit 10
Bit 9
[
Doc ID 16737 Rev 2
[
step
step
[
step
s /
s /
Bit 8
]
]
2
=
=
s /
the following formula can be used:
MAX
MIN
2
Bit 7
]
=
_
_
DEC
MIN_SPEED
SPEED
SPEED
Bit 6
tick
tick
tick
⋅
2
2
−
40
Bit 5
⋅
⋅
2
2
−
−
24
18
9.1.22
Bit 4
).
Bit 3
Programming manual
Bit 2
2
Bit 1
(format
Bit 0
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