Datasheet
Table Of Contents
- Table 1. Device summary
- 1 Block diagram
- 2 Electrical data
- 3 Electrical characteristics
- 4 Pin connection
- 5 Typical applications
- 6 Functional description
- 6.1 Device power-up
- 6.2 Logic I/O
- 6.3 Charge pump
- 6.4 Microstepping
- 6.5 Absolute position counter
- 6.6 Programmable speed profiles
- 6.7 Motor control commands
- 6.8 Internal oscillator and oscillator driver
- 6.9 Overcurrent detection
- 6.10 Undervoltage lockout (UVLO)
- 6.11 Thermal warning and thermal shutdown
- 6.12 Reset and standby
- 6.13 External switch (SW pin)
- 6.14 Programmable DMOS slew rate, deadtime and blanking time
- 6.15 Integrated analog-to-digital converter
- 6.16 Internal voltage regulator
- 6.17 BUSY\SYNC pin
- 6.18 FLAG pin
- 7 Phase current control
- 8 Serial interface
- 9 Programming manual
- 9.1 Registers and flags description
- Table 9. Register map
- 9.1.1 ABS_POS
- 9.1.2 EL_POS
- 9.1.3 MARK
- 9.1.4 SPEED
- 9.1.5 ACC
- 9.1.6 DEC
- 9.1.7 MAX_SPEED
- 9.1.8 MIN_SPEED
- 9.1.9 FS_SPD
- 9.1.10 KVAL_HOLD, KVAL_RUN, KVAL_ACC and KVAL_DEC
- 9.1.11 INT_SPEED
- 9.1.12 ST_SLP
- 9.1.13 FN_SLP_ACC
- 9.1.14 FN_SLP_DEC
- 9.1.15 K_THERM
- 9.1.16 ADC_OUT
- 9.1.17 OCD_TH
- 9.1.18 STALL_TH
- 9.1.19 STEP_MODE
- 9.1.20 ALARM_EN
- 9.1.21 CONFIG
- Table 22. CONFIG register
- Table 23. Oscillator management
- Table 24. External switch hard stop interrupt mode
- Table 25. Overcurrent event
- Table 26. Programmable power bridge output slew rate values
- Table 27. Motor supply voltage compensation enable
- Table 28. PWM frequency: integer division factor
- Table 29. PWM frequency: multiplication factor
- Table 30. Available PWM frequencies [kHz]: 8-MHz oscillator frequency
- Table 31. Available PWM frequencies [kHz]: 16-MHz oscillator frequency
- Table 32. Available PWM frequencies [kHz]: 24-MHz oscillator frequency
- Table 33. Available PWM frequencies [kHz]: 32-MHz oscillator frequency
- 9.1.22 STATUS
- 9.2 Application commands
- Table 37. Application commands
- 9.2.1 Command management
- 9.2.2 Nop
- 9.2.3 SetParam (PARAM, VALUE)
- 9.2.4 GetParam (PARAM)
- 9.2.5 Run (DIR, SPD)
- 9.2.6 StepClock (DIR)
- 9.2.7 Move (DIR, N_STEP)
- 9.2.8 GoTo (ABS_POS)
- 9.2.9 GoTo_DIR (DIR, ABS_POS)
- 9.2.10 GoUntil (ACT, DIR, SPD)
- 9.2.11 ReleaseSW (ACT, DIR)
- 9.2.12 GoHome
- 9.2.13 GoMark
- 9.2.14 ResetPos
- 9.2.15 ResetDevice
- 9.2.16 SoftStop
- 9.2.17 HardStop
- 9.2.18 SoftHiZ
- 9.2.19 HardHiZ
- 9.2.20 GetStatus
- 9.1 Registers and flags description
- 10 Package mechanical data
- 11 Revision history
L6470 Programming manual
Doc ID16737 Rev 5 45/70
The available range is from 0 to 976.5 step/s with a resolution of 0.0596 step/s.
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 Section 9.1.22).
9.1.12 ST_SLP
The ST_SLP register contains the BEMF compensation curve slope that is used when the
speed is lower than the intersect speed (see Section 7.4). Its value is expressed in s/step
and the available range is from 0 to 0.004 with a resolution of 0.000015.
When ST_SLP, FN_SLP_ACC and FN_SLP_DEC parameters are set to zero, no BEMF
compensation is performed.
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 Section 9.1.22).
9.1.13 FN_SLP_ACC
The FN_SLP_ACC register contains the BEMF compensation curve slope that is used when
the speed is greater than the intersect speed during acceleration (see Section 7.47.4). Its
value is expressed in s/step and the available range is from 0 to 0.004 with a resolution of
0.000015.
When ST_SLP, FN_SLP_ACC and FN_SLP_DEC parameters are set to zero, no BEMF
compensation is performed.
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 Section 9.1.22).
9.1.14 FN_SLP_DEC
The FN_SLP_DEC register contains the BEMF compensation curve slope that is used when
the speed is greater than the intersect speed during deceleration (see Section 7.47.4). Its
value is expressed in s/step and the available range is from 0 to 0.004 with a resolution of
0.000015.
When ST_SLP, FN_SLP_ACC and FN_SLP_DEC parameters are set to zero, no BEMF
compensation is performed.
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 Section 9.1.22).
9.1.15 K_THERM
The K_THERM register contains the value used by the winding resistance thermal drift
compensation system (see Section 7.6).
The available range is from 1 to 1.46875 with a resolution of 0.03125, as shown in Tabl e 13 .
Table 13. Winding resistance thermal drift compensation coefficient
K_THERM [3..0] Compensation coeff.
0000 1
0 0 0 1 1.03125
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