Datasheet

TMC4361A Datasheet | Document Revision 1.22 • 2017-JAN-12
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to technical change reserved. Download newest version at: www.trinamic.com .
Read entire documentation; especially the “Supplemental Directives” on page 224.
 MAIN MANUAL 
Current Scaling Configuration Register CURRENT_CONF 0x05
CURRENT_CONF 0x05 (Default: 0x00000000)
R/W
Bit
Val
Remarks
RW
0
hold_current_scale_en
0
No hold current scaling during standstill phase.
1
Hold current scaling during standstill phase.
1
drive_current_scale_en
0
No drive current scaling during motion.
1
Drive current scaling during motion.
2
boost_current_on_acc_en
0
No boost current scaling for deceleration ramps.
1
Boost current scaling if RAMP_STATE = b’01 (acceleration slopes).
3
boost_current_on_dec_en
0
No boost current scaling for deceleration ramps.
1
Boost current scaling if RAMP_STATE = b’10 (deceleration slopes).
4
boost_current_after_start_en
0
No boost current at ramp start.
1
Temporary boost current if VACTUAL = 0 and new ramp starts.
5
sec_drive_current_scale_en
0
One drive current value for the whole motion ramp.
1
Second drive current scaling for VACTUAL > VDRV_SCALE_LIMIT .
6
freewheeling_en
0
No freewheeling.
1
Freewheeling after standby phase.
7
closed_loop_scale_en
0
No closed-loop current scaling.
1
Closed-loop current scaling – CURRENT_CONF (6:0) = 0 is set automatically
Turn off for closed-loop calibration with maximum current!
8
pwm_scale_en
0
PWM scaling is disabled.
1
PWM scaling is enabled.
15:9
Reserved. Set to 0x00.
31:16
PWM_AMPL
U
PWM amplitude during Voltage PWM mode at VACTUAL = 0.
i Maximum duty cycle = (0.5 + ( PWM_AMPL + 1) / 2
17
)
Minimum duty cycle = (0.5 – ( PWM_AMPL + 1) / 2
17
)
PWM_AMPL = 2
16
– 1 at VACTUAL = PWM_VMAX.
Table 70: Current Scale Configuration (0x05)