Datasheet

TMC4361A Datasheet | Document Revision 1.22 • 2017-JAN-12
169/230
© 2015 TRINAMIC Motion Control GmbH & Co. KG, Hamburg, Germany — Terms of delivery and rights
to technical change reserved. Download newest version at: www.trinamic.com .
Read entire documentation; especially the “Supplemental Directives” on page 224.
 MAIN MANUAL 
17. Reset and Clock Gating
In addition to the hardware reset pin NRST and the automatic Power-on-Reset procedure,
TMC4361A provides a software reset option. If not in operation, clock gating can be used to
reduce power consumption.
Reset and Clock Pins
Pin Names
Types
Remarks
NRST
Input
Low active hardware reset.
STPIN
Input
High active wake-up signal.
CLK_EXT
Input
Connected external clock signal.
Table 61: Dedicated Reset and Clock Pins
Reset and Clock Gating Registers
Register Name
Register address
Remarks
GENERAL_CONF
0x00
RW
Bit18:17
CLK_GATING_DELAY
0x14
RW
Dela time before clock gating is enabled.
CLK_GATING_REG
0x4F (2:0)
RW
Trigger for clock gating.
RESET_REG
0x4F (31:8)
RW
Trigger for SW-Reset.
Table 62: Dedicated Reset and Clock Gating Registers
A hardware reset is provided by the NRST input pin.
In order to reset TMC4361A, do as follows:
Action:
 Set NRST input to low voltage level.
Result:
TMC4361A registers are reset to default values.
NOTE:
 During power-up of TMC4361A, Power-on-Reset is executed automatically.
In order to reset TMC4361A without use of NRST pin, do as follows:
Action:
 Set RESET_REG = 0x525354 (Bits31:8 of register 0x4F).
Result:
TMC4361A registers are reset to default values.
NOTE:
 A software reset can be activated in all cases, except for one:
 Due to safety reasons, only hardware resets are available during the FROZEN
event to overcome this freeze condition (see chapter 12, page 128).
RST_EV = EVENTS(31) is set as indicator signifying that one of the possible
reset conditions was triggered.
Manual
Hardware Reset
Manual
Software Reset
Reset Indication