ST AN3103 Application note

AN3103

Application note

Fully integrated microstepping motor driver using the L6470

Introduction

This application note describes the demonstration board for the fully integrated microstepping motor driver L6470.

The board is designed to be used with IBU universal interface (IBU-UI) or universal USB-to- serial communication interface (UUSCI) board and the dSPIN Evaluation tool software.

Figure 1. EVAL6470 demonstration board

March 2010

Doc ID 16760 Rev 1

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www.st.com

Contents	AN3103

Contents

1	Board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 5
2	Connection to IBU universal interface board . . . . . . . . . . . . . . . . . . . .		12
3	dSPIN Evaluation tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		13
	3.1	Software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
	3.2	Main form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13

3.2.1 Menu and toolbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2.2 Positioning commands tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2.3 Speed command tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2.4 HardStop, SoftStop, HardHiZ and SoftHiZ buttons . . . . . . . . . . . . . . . . 14 3.2.5 Device status panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3 Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.4 Device configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17

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AN3103	List of tables

List of tables

Table 1. EVAL6470: jumper and connector description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 2. EVAL6470: master SPI connector pinout (J10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. EVAL6470: slave SPI connector pinout (J11). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4. EVAL6470: electrical specification (recommended values) . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 5. EVAL6470: component list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 6. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

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List of figures	AN3103

List of figures

Figure 1. EVAL6470 demonstration board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. EVAL6470 demonstration board jumper and connector locations . . . . . . . . . . . . . . . . . . . . 5 Figure 3. EVAL6470 schematic - part 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4. EVAL6470 schematic - part 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 5. EVAL6470 layout (top layer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 6. EVAL6470 layout (bottom layer). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 7. dSPIN Evaluation tool main form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 8. dSPIN Evaluation tool Register Map form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 9. dSPIN Evaluation tool device configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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AN3103	Board description

1 Board description

Figure 2. EVAL6470 demonstration board jumper and connector locations

	Table 1.	EVAL6470: jumper and connector description
		Name	Type	Function
		J4	Power supply	Board power supply
		J2	Power outputs	Bridge A outputs
		J3	Power outputs	Bridge B outputs
		J10	SPI connector	Master SPI connector
		J11	SPI connector	Slave SPI connector
		SW	NM test point	External switch connector
		VS	Test point	Motor supply voltage
		VREG	Test point	Internal 3 V regulator output
		VDD	Test point	Logic interface voltage
		GND	Test point	Ground
		JP7	Jumper	Selects SPI connector PWM2 GPIO functionality
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Board description				AN3103
	Table 1.	EVAL6470: jumper and connector description (continued)
		Name	Type	Function
		JP2	Jumper	Daisy chain termination
		JP5	Jumper	EXT_VDD (SPI connector) to VDD connection
		JP3	Jumper	VDD to VREG connection
		JP4	Jumper	Selects ADCIN source

Table 2.	EVAL6470: master SPI connector pinout (J10)
Pin number		Description
	1	L6470 BUSY open drain output
	2	L6470 FLAG open drain output
	3	Ground
	4	EXT_VDD (can be used as external logic power supply)
	5	SPI master in, slave out signal (connected to L6470 SDO output through
		daisy chain termination jumper JP2)
	6	SPI serial clock signal (connected to L6470 CK input)
	7	SPI master out, slave in signal (connected to L6470 SDI input)
	8	SPI slave select signal (connected to L6470 CS input)
	9	PWM1 input
	10	PWM2 input

Table 3.	EVAL6470: slave SPI connector pinout (J11)
Pin number		Description
	1	L6470 BUSY open drain output
	2	L6470 FLAG open drain output
	3	Ground
	4	EXT_VDD (can be used as external logic power supply)
	5	SPI master in, slave out signal (connected to pin 5 of J10)
	6	SPI serial clock signal (connected to L6470 CK input)
	7	SPI master out, slave in signal (connected to L6470 SDO output)
	8	SPI slave select signal (connected to L6470 CS input)
	9	PWM1 input
	10	PWM2 input

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