TMC428_06 Datasheet, PDF(55/58 Page) List of Unclassifed Manufacturers – Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces

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TMC428_06 Datasheet, PDF (55/58 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)

20 Table of Figures

Figure 2-1: TMC428 application environment with TMC428 in SSOP16 package.................................3

Figure 2-2: Usage of drivers without serial data output (SDO) with TMC428 in larger packages (*the

DI20 package variant is not recommended for new designs) .........................................................4

Figure 4-1: TMC428 pin out (*the DIL20 package variant is not recommended for new designs) .........6

Figure 5-1: TMC428 functional block diagram........................................................................................7

Figure 6-1: Timing diagram of the serial ÂµC interface ............................................................................8

Figure 4 : Making the TMC428 SDO_C output high impedance with single gate 74HCT1G125 ...........9

Figure 6-3: Timing diagram of the serial stepper motor driver interface...............................................10

Figure 8-1: Velocity ramp parameters and velocity profiles..................................................................16

Figure 8-2: Ramp generator and pulse generator ................................................................................20

Figure 8-3: Proportionality parameter p and outline of velocity profile(s) .............................................21

Figure 8-4: Left switch and right switch for reference search and automatic stop function..................23

Figure 9-1: Example of status bit mapping for a chain of three TMC246 or TMC249..........................27

Figure 9-2: Cover datagram example...................................................................................................28

Figure 9-3: Reference switch configuration âleft-side-onlyâ for mot1r=0 (and refmux=0)......................32

Figure 9-4: Reference switch configuration âtwo-one-nullâ for mot1r=1 (and refmux=0).......................32

Figure 9-5: Reference switch multiplexing with 74HC157 (refmux=1) .................................................32

Figure 9-6: Triple switch configuration 'left stop switch - reference switch - right stop switch' .............33

Figure 9-7: Reference search...............................................................................................................34

Figure 9-8: Reference switch gateing for exact simultanous stepper motor start ................................34

Figure 11-1: Serially transmitted control and status signals between TMC428 and driver chain .........36

Figure 12-1: Microstep enhancemant by introduction of a shape function fÏ(Ï ) ..................................43

Figure 14-1: Package Outline Drawing SSOP16, 150 MILS ................................................................45

Figure 14-2: Package Outline Drawing SOP24, 300 MILS...................................................................46

Figure 14-3: Package Outline Drawing DIL20, 300 MILS (not recommended for new designs)..........47

Figure 16-1: 3.3V operation (CMOS) vs. 5V operation (TTL)...............................................................49

Figure 17-1: Operating principle of the power-on-reset........................................................................50

Figure 18-1: General timing parameters...............................................................................................52

21 Table of Tables

Table 3-1: TMC428 package variants ....................................................................................................5

Table 4-1: TMC428 pin out (*the DIL20 package variant is not recommended for new designs) ..........6

Table 6-1: Timing characteristics of the serial microcontroller interface ..............................................10

Table 6-2: Timing characteristics of the serial stepper motor driver interface......................................10

Table 6-3 : 32 bit DATAGRAM structure sent from ÂµC (MSB sent first) ..............................................11

Table 6-4: 32 bit DATAGRAM structure received by ÂµC (MSB received first)......................................12

Table 7-1: TMC428 address space partitions.......................................................................................14

Table 7-2: TMC428 register address mapping .....................................................................................15

Table 8-1: Coil current scale factors.....................................................................................................18

Table 8-2: Current scale selection scheme ..........................................................................................19

Table 8-3 - Outline of TMC428 motion modes .....................................................................................22

Table 8-4: Reference switch configuration bits (ref_conf) ....................................................................23

Table 8-5: lp & ref_conf & ramp_mode (rm) data bit positions.............................................................24

Table 8-6: interrupt bit mnemonics .......................................................................................................25

Table 8-7: interrupt register & interrupt mask .......................................................................................25

Table 8-8: micro step resolution selection (usrs) parameter ................................................................26

Table 9-1: Stepper motor global parameter register.............................................................................30

Table 9-2: Global parameter LSMD (last stepper motor driver) ...........................................................30

Table 9-3: Association of reference inputs depending on configuration bits refmux & mot1r ..............33

Table 10-1: Partitioning of the on-chip RAM address space ................................................................35

Table 11-1: Primary signal codes .........................................................................................................37

Table 11-2: Datagram example and RAM contents for three stepper motor driver chain....................38

Table 11-3: Configuration datagram sequence for the example (with '-' (don't cares))........................39

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