L6470HTR STMicroelectronics, L6470HTR Datasheet - Page 21

• Manufacturer Part Number: L6470HTR
• Description: IC STEPPER/DC MOTOR DVR 28HTSSOP
• Manufacturer: STMicroelectronics

Specifications of L6470HTR

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10812-2

L6470
6.5
6.6
6.6.1
Figure 6.
When motor speed is greater than a programmable full step speed threshold, the L6470
switches automatically to full-step mode; the driving mode returns to microstepping when
motor speed decrease below the full step speed threshold. Full step speed threshold is set
through the FS_SPD register (see
Absolute position counter
An internal 22 bit register (ABS_POS) takes memory of motor motion according to the
selected step mode; the stored value unit is equal to the selected step mode (full, half,
quarter, etc.). The position range is from -2
Programmable speed profiles
The user can easily program a customized speed profile defining independently
acceleration, deceleration, maximum and minimum speed values by ACC, DEC,
MAX_SPEED and MIN_SPEED registers respectively (see
9.1.8).
When a command is sent to the device, the integrated logic generates the microstep
frequency profile that performs a motor motion compliant to speed profile boundaries.
All acceleration parameters are expressed in step/tick
expressed in step/tick; the unit of measure does not depend on selected step mode.
Acceleration and deceleration parameters range from 2
(equivalent to 14.55 to 59590 step/s
Minimum speed parameter ranges from 0 to (2
step/s).
Maximum speed parameter ranges from 2
15610 step/s).
Infinite acceleration/deceleration mode
When ACC register value is set to max (0xFFF), system works in “infinite acceleration
mode”: acceleration and deceleration phases are totally skipped as shown in
It is not possible to skip the acceleration or deceleration phase independently.
Speed profile in infinite acceleration/deceleration mode
Doc ID 16737 Rev 2
Section
2
).
-18
9.1.9).
21
to +2
to (2
12
-
1
10
21
)
•
-1)
2
-1 (µ)steps (see
-24
2
•
and all speed parameters are
-40
2
step/tick (equivalent to 0 to 976.3
-18
to (2
Section
step/tick (equivalent to 15.25 to
12
-2)
Functional description
9.1.5, 9.1.6,
•
Section
2
-40
step/tick
9.1.1).
Figure
9.1.7
2
6.
and
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