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MAS6012AA2ST206 Datasheet(PDF) 3 Page - Micro Analog systems |
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MAS6012AA2ST206 Datasheet(HTML) 3 Page - Micro Analog systems |
3 / 9 page DA6012.000 30 June 2008 3 (9) OPERATION DESCRIPTION MAS6012 is a stepper motor driver IC specifically designed to drive bipolar stepper motors of pointers in a car and motorcycle dashboard and in the other similar applications. The IC is operated from single 5V supply. Each stepper motor output is controlled by two digital control signal inputs, FSCX and CW. Each rising edge of FSCX stepping clock input causes stepper motor to step one microstep (15 degree angular rotation of rotor) ahead. Rotation direction is determined by CW rotation direction selection signal. High CW selects clockwise direction and low CW selects counterclockwise direction. Each of the four stepper motor drivers (A, B, C, D) have their own FSCX and CW control inputs. For each of the motors there are four outputs. Outputs OUTx1 and OUTx2 are for driving first motor coil and outputs OUTx3 and OUTx4 are for driving second motor coil where x is one of the four motor drivers A, B, C or D. The output signal waveforms consist of digitized sine waves which have 60° phase shift (see figure 2). The device has common XRESET master reset control input for resetting stepper motor outputs to initial state. The initial state corresponds to step number 1 state (see figure 2). XRESET is active low. Each digital input has a glitch filter for eliminating effects of electrical disturbances at the control inputs. It is recommended to keep XRESET signal low (active) during power up until the supply voltage VDD has risen up. MAS6012 Microstepping Output Waveform -5 -4 -3 -2 -1 0 1 2 3 4 5 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 14.5 15.5 16.5 17.5 18.5 19.5 20.5 21.5 22.5 23.5 24.5 Step [No] OUTx1-OUTx2 OUTx4-OUTx3 Phase shift 60°°°° (4 steps) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Figure 2. MAS6012 Microstepping Output Waveform (x=A, B, C or D) |
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