TMC428_06 Datasheet, PDF(25/58 Page) List of Unclassifed Manufacturers – Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces

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TMC428_06 Datasheet, PDF (25/58 Pages) List of Unclassifed Manufacturers – Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces

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TMC428 DATASHEET (v. 2.02 / April 26th, 2006)

Demultiplexing of the multiplexed interrupt status signal at the pin SDO_C / nINT can be done using

additional hardware. It is not necessary if the microcontroller always disables its interrupt while it sends

a datagram to the TMC428.

interrupt bit mnemonic function

INT_POS_END stepper motor reached target position

INT_REF_WRONG reference switch signal was active outside the reference switch tolerance range

(dx_ref_tolerance)

INT_REF_MISS reference switch signal missing at null position

INT_STOP stop forced by reference switch during motion

INT_STOP_LEFT_LOW high to low transition of left reference switch

INT_STOP_RIGHT_LOW high to low transition of right reference switch

INT_STOP_LEFT_HIGH low to high transition of left reference switch

INT_STOP_RIGHT_HIGH low to high transition of right reference switch

Table 8-6: interrupt bit mnemonics

32 bit DATAGRAM sent from a ÂµC to the TMC428

33222222222211111111119876543210

1098765432109876543210

ADDRESS

DATA

smd

interrupt mask

interrupt flags

Table 8-7: interrupt register & interrupt mask

An interrupt flag is set to â1â if its assigned interrupt condition occurs and the corresponding interrupt

mask is set (â1â). Interrupt flags are reset to â0â by a write access (RW=â0â) to the interrupt register

address (IDX=%1011) with a â1â at the position of the bit to be cleared. Writing a â0â to the

corresponding position leaves the interrupt flag untouched.

If an end position is reached while the interrupt mask MASK_POS_END is â1â, the bit named

INT_POS_END is set to one. The switches processed via the inputs REF1, REF2, REF3 can be used

as stop switches for automatic motion limiting, as reference switches and for both. If a reference switch

becomes active out of the reference switch tolerance rangeâ defined by the dx_ref_tolerance register

âthe interrupt flag INT_REF_WRONG is set if its interrupt mask bit MASK_REF_WRONG is set. The

interrupt flag INT_REF_MISS is set if the reference switch is inactive at the 0 position and the mask

MASK_REF_MISS is enabled. The INT_STOP flag is set, if the reference switch has forced a stop and

if the interrupt mask MASK_STOP is set. The INT_STOP_LEFT_LOW flag is set if the reference

switch changes from high to low and if the interrupt mask bit MASK_STOP_LEFT_LOW is set. The

interrupt flag INT_STOP_RIGHT_LOW is similar to INT_STOP_LEFT_LOW but for the right reference

switch. The INT_STOP_LEFT_HIGH indicates that the left reference switch input changes from low to

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