M32CSLASH8A datasheet(195/372 Pages) RENESAS

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M32C/8A Group

16. Three-Phase Motor Control Timer Function

Rev.1.00

Jul 15, 2007

Page 178 of 352

REJ09B0385-0100

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

Specification

Control method

Three-phase full wave method

Modulation modes

• Triangular wave modulation mode

• Sawtooth wave modulation mode

Active level

Selectable either active High or active Low

Timers to be used

• 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):

Short circuit prevention features

• 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

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