TMP88PH41NG Datasheet, PDF (107/194 Pages) Toshiba Semiconductor – 8 Bit Microcontroller

TMP88PH41NG
12. Motor Control Circuit (PMD: Programmable motor driver)
The TMP88PH41NG contains one channel of motor control circuits used for sinusoidal waveform output. This
motor control circuit can control brushless DC motors or AC motors with or without sensors. With its primary func-
tions like those listed below incorporated in hardware, it helps to accomplish sine wave motor control easily, with
the software load significantly reduced.
1. Rotor position detect function
• Can detect the rotor position, with or without sensors
• Can be set to determine the rotor position when detection matched a number of times, to prevent erro-
neous detection
• Can set a position detection inhibit period immediately after PWM-on
2. Independent timer and timer capture functions for motor control
• Contains one-channel magnitude comparison timer and two-channel coincidence comparison timers
that operate synchronously for position detection
3. PWM waveform generating function
• Generates 12-bit PWM with 100 ns resolution
• Can set a frequency of PWM interrupt occurrence
• Can set the dead time at PWM-on
4. Protective function
• Provides overload protective function based on protection signal input
5. Emergency stop function in case of failure
• Can be made to stop in an emergency by EMG input or timer overflow interrupt
• Not easily cleared by software runaway
6. Auto commutation/Auto position detection start function
• Comprised of dual-buffers, can activate auto commutation synchronously with position detection or
timer
• Can set a position detection period using the timer function and start auto position detection at the set
time
7. Electrical angle timer function
• Can count 360 degrees of electrical angle with a set period in the range of 0 to 383
• Can output the counted electrical angle to the waveform arithmetic circuit
8. Waveform arithmetic circuit
• Calculate the output duty cycle from the sine wave data and voltage data which are read from the RAM
based on the electrical angle timer
• Output the calculation result to the waveform synthesis circuit
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