M32C8A Datasheet, PDF (195/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
16. Three-Phase Motor Control Timer Function
16. Three-Phase Motor Control Timer Function
The PWM waveform can be output by using timers B2, A1, A2, and A4. Timer B2 is used for the carrier wave control,
and timers A4, A1, and A2 for the U-, V-, and W-phase PWM control.
Table 16.1 lists specifications of the three-phase motor control timer functions. Table 16.2 lists pin settings. Figure
16.1 shows a block diagram. Figures 16.2 to 16.10 show registers associated with the three-phase motor control timer
function.
Table 16.1 Specifications of Three-Phase Motor Control Timers
Item
Control method
Modulation modes
Active level
Specification
Three-phase full wave method
• Triangular wave modulation mode
• Sawtooth wave modulation mode
Selectable either active High or active Low
Timers to be used
Short circuit prevention features
• Timer B2 (Carrier wave cycle control: used in timer mode)
• Timers A4, A1, and A2
(U-, V-, W-phase PWM control: used in one-shot timer mode):
• Prevention function against upper and lower arm short circuit caused by
program errors
• Arm short circuit prevention function using dead time timer
• Forced cutoff function by NMI input
Rev.1.00 Jul 15, 2007 Page 178 of 352
REJ09B0385-0100