EVAL6470H

EVAL6470H Fully integrated stepper motor driver mounting the L6470 Data brief Description The EVAL6470H demonstration board is a fully integrated microstepping motor driver. In combination with the STEVAL-PCC009V2 communication board and the SPIN evaluation software, the board allows the user to investigate all the features of the L6470 device. In particular, the board can be used to check the voltage mode driving and to regulate the L6470 parameters in order to fit the application requirements. The EVAL6470H supports the daisy chain configuration making it suitable for the evaluation of the L6470 in multi motor applications. Features  Voltage range from 8 V to 45 V  Phase current up to 3 Arms.  SPI with daisy chain feature  Socket for external resonator or crystal  SW input  FLAG and BUSY LED indicators  Adjustable supply voltage compensation  Suitable to be used in combination with STEVAL-PCC009V2 March 2015 DocID022736 Rev 3 For further information contact your local STMicroelectronics sales office. 1/11 www.st.com Board description EVAL6470H Board description Table 1. EVAL6470H specifications Parameter Value Supply voltage (VS) 8 to 45 V Maximum output current (each phase) 3 Ar.m.s. Logic supply voltage (VREG) Externally supplied: 3.3 V, internally supplied: 3 V (typ.) Logic interface voltage (VDD) Externally supplied: 3.3 V or 5 V, internally supplied: VREG Low level logic inputs voltage 0V High level logic input voltage VDD(1) Operating temperature -25 to +125 °C L6470H thermal resistance junction to ambient 21 °C/W (typ.) 1. All logic inputs are 5 V tolerant. Figure 1. Jumpers and connectors location FLAG LED (Red) Application reference area Power supply connector (8 V - 45 V) BUSY LED (Amber) JP1: VDD supply from master SPI connector JP3: Daisy chain termination Slave SPI connector Master SPI connector JP2: VDD to VREG connection External switch connector (SW input) Motor supply voltege compensation partitioning regulation (ADCIN input) OSCIN/OSCOUT connector Phase A connector Phase B connector AM11330v1 2/11 DocID022736 Rev 3 EVAL6470H Board description Table 2. Jumpers and connectors description Name Type Function J1 Power supply Motor supply voltage J5 Power output Bridge A outputs J6 Power output Bridge B outputs J2 SPI connector Master SPI J3 SPI connector Slave SPI J4 NM connector OSCIN and OSCOUT pins J7 NM connector External switch input TP1 (VS) Test point Motor supply voltage test point TP4 (VDD) Test point Logic interface supply voltage test point TP5 (VREG) Test point Logic supply voltage/L6470 internal regulator test point TP6 (GND) Test point Ground test point TP2 (STCK) Test point Step clock input test point TP3 (STBY/RES) Test point Standby/reset input test point TP7 (FLAG) Test point FLAG output test point TP8 (BUSY/SYNC) Test point BUSY/SYNC output test point Table 3. Master SPI connector pinout (J10) Pin number Type Description 1 Open drain output L6470 BUSY/SYNC output 2 Open drain output L6470 FLAG output 3 Ground Ground 4 Supply EXT_VDD (can be used as external logic power supply) 5 Digital output SPI “Master In Slave Out” signal (connected to L6470 SDO output through daisy chain termination jumper JP2) 6 Digital input SPI serial clock signal (connected to L6470 CK input) 7 Digital input SPI “Master Out Slave In” signal (connected to L6470 SDI input) 8 Digital input SPI slave select signal (connected to L6470 CS input) 9 Digital input L6470 step-clock input 10 Digital input L6470 STBY/RST input DocID022736 Rev 3 3/11 11 Board description EVAL6470H Table 4. SPI connector pinout (J11) 4/11 Pin number Type Description 1 Open drain output L6470 BUSY/SYNC output 2 Open drain output L6470 FLAG output 3 Ground Ground 4 Supply EXT_VDD (can be used as external logic power supply) 5 Digital output SPI “Master In Slave Out” signal (connected to pin 5 of J10) 6 Digital input SPI serial clock signal (connected to L6470 CK input) 7 Digital input SPI “Master Out Slave In” signal (connected to L6470 SDO output) 8 Digital input SPI slave select signal (connected to L6470 CS input) 9 Digital input L6470 step-clock input 10 Digital input L6470 STBY/RST input DocID022736 Rev 3   5 N 5 . 5 N  DocID022736 Rev 3   /('5('  )/$*    /('$0%(5 '/ %86< 6: 10 5    5 '*1'    - &6 &. 6', 6'2  & Q)9  96 287% 287% 287$ 287$ & Q)9 6: 73 & Q)9     73 9'' *1'  & X)9 (;7B9'' &. Q&6 67%