TMC428_06 Datasheet, PDF(13/58 Page) List of Unclassifed Manufacturers – Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces

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TMC428_06 Datasheet, PDF (13/58 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)

6.5 Simple Datagram Examples

The % prefixâ normally indicating binary representation in this data sheet âis omitted for the following

datagram examples. Assuming, one would like to write (RW=0) to a register (RRS=0) at the address

%001101 the following data word %0000 0000 0000 0001 0010 0011, one would have to send the

following 32 bit datagram

01100110000000000000000100100011

to the TMC428. With inactive interrupt (INT=0), no cover datagram waiting (CDGW=0), all reference

switches inactive (RS3=0, RS2=0, RS1=0), and all stepper motors at target position (xEQt3=1,

xEQt2=1, xEQt1=1) the status bits would be %10010101 the TMC428 would send back the 32 bit

datagram:

10010101000000000000000000000000

To read (RW=1) back the register written before, one would have to send the 32 bit datagram

01100111000000000000000000000000

to the TMC428 and would get back from it the datagram

10010101000000000000000100100011.

Write (RW=0) access to on-chip RAM (RRS=1) to an address %111111 occurs similar to register

access, but with RRS=1. To write two 6 bit data words %100001 and %100011 to successive pair-wise

RAM addresses %1111110 and %1111111 (%100001 to %1111110 and %100011 to %1111111)

which are commonly addressed by one datagram (see pages 14 and 35), one would have to send the

datagram

11111110000000000010001100100001.

To read (rw=1) from that on-chip memory address, one would have to send the datagram

11111111000000000000000000000000.

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