EVAL6227PD STMicroelectronics

AN1794 Application note PractiSPIN evaluation system configuration and set up guide Introduction PractiSPIN is an evaluation and demonstration system that can be used with several STMicroelectronics motor driver integrated circuit devices. The system consists of a Graphical User Interface (GUI) program which runs on an IBM-PC under windows, a common ST7 based interface board that communicates with the PC and the practiSPIN software via a serial COMM port, and a device specific evaluation or target board that connects to the ST7 interface board via a standard 34 pin ribbon cable interface, as shown in Figure 1. The target PCB connects to the motor or motors and to a user supplied DC power supply generally in the range of 12 to 48 Vdc. The practiSPIN system is designed to operate the device being evaluated (the target device) under control of the practiSPIN software. Depending on which target device is being used, the practiSPIN software can operate the device to drive a stepper motor, 1 or 2 DC motors or a brushless DC (BLDC) motor. Figure 1. System block diagram January 2008 Rev 2 1/34 www.st.comContents AN1794 Contents 1 System overview 5 1.1 Target board 5 1.2 Control interface board 5 2 Starting practiSPIN 7 3 Stepper motor drive . 8 3.1 Constant speed mode 8 3.2 Indexing mode 9 4 DC motor drive 10 4.1 Dual DC motor control mode 10 5 BLDC motor drive 11 5.1 BLDC motor control mode 11 6 EVAL6205N board configuration 12 6.1 Vref offset adjustment (R18) 14 6.2 Current scaling . 14 7 EVAL6206N board configuration 15 7.1 Vref offset adjustment (R18) 17 7.2 Current scaling . 17 8 EVAL6206PD board configuration . 18 8.1 Vref offset adjustment (R18) 20 8.2 Current scaling . 20 9 EVAL6207N board configuration 21 9.1 Vref offset adjustment (R18) 23 9.2 Current scaling . 23 10 EVAL6208N board configuration 24 10.1 Vref offset adjustment (R18) 26 2/34