Datasheet
TMC4671 Datasheet • IC Version V1.3 | Document Revision V2.00 • 2020-Apr-17
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15 Fixes of TMC4671-LA/-ES2 vs. Errata of TMC4671-ES
# TMC4671-ES Erratum TMC4671-LA Fix Description
1 SPI slave MSB read error SPI slave correction read via SPI slave now works correct
2 RTMI critical timing RTMI enhanced
RTMI works with isolated RTMI-USB IF
3 PI advanced controller PI scaling updated scaling selectable available
4 ADC group clock cross talk ADC clocks corrected crosstalk eliminated
5 PWM_IDLE_L/_H un-used
PWM outputs are at high
impedance until ENI is
high
User can configure PWM signal polar-
ity and afterwards enable PWM sig-
nals. Idle state can be set with PD or
PU resistor on PWM outputs
6 Space Vector PWM
SVPWM scaling corrected
SVPWM gives +12% effective voltage.
With Space Vector PWM enabled volt-
age scaling is modified.
7 step direction target position processing corrected step direction as target position
8 ABN encoder register access access corrected ABN counter over-writeable
9 ENI and ENO function updated ENI and ENO act as enable signals
10 - Hall sync PWM sample
optional Hall sampling at PWM center
11 -
PWM_POLARITIES regis-
ter initialized to 0x0
Active high PWM signal polarity is pre-
ferred
12 -
Registers PHI_M_EXT and
POSITION_EXT removed
Registers were not used
13 Watchdog not properly working Watchdog removed
Watchdog was intended to monitor
CLK. Watchdog flag can not be reset.
Table 36: TMC4671-ES Errata vs. TMC4671-ES2/-LA Fixes
15.1 Errata of TMC4671-ES Engineering Samples as Reference
1. SPI Slave Interface
The SPI Slave Interface in the TMC4671-ES might show corrupted MSB of read data.
2. Realtime Monitoring Interface
The RTMI of TMC4671-ES could not be used with galvanic isolation due to timing issue.
3. PI Controllers
The P Factor of the TMC4671-ES in the advanced position controller was not properly scaled and the
integrator in the advanced PI controller was not reset when P or I parameters are set to zero.
4. Integrated ADCs
The Delta Sigma ADCs of TMC4671-ES showed signal cross talk caused by ADC clock cross talk.
5. Pins PWM_IDLE_H and PWM_IDLE_L without function
Pins PWM_IDLE_H and PWM_IDLE_L of TMC4671-ES were proposed to set gate driver control polarity.
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