M30620FCAFP datasheet(97/274 Pages) MITSUBISHI

97 / 274 page

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Timers’ functions for three-phase motor control

Bit name

Timer Ai mode register

Symbol

Address

When reset

TA1MR

039716

0016

TA2MR

039816

0016

TA3MR

039A16

0016

Function

Bit symbol

b2 b1

Operation mode

select bit

1 0 : One-shot timer mode

b1 b0

TMOD1

TMOD0

MR0

Pulse output function

select bit

0 (Must always be “0” in three-phase PWM

output mode)

MR2

MR1

MR3

0 (Must always be “0” in one-shot timer mode)

0 0 : f1

0 1 : f8

1 0 : f32

1 1 : fC32

b7 b6

TCK1

TCK0

Count source select bit

1 : Selected by event/trigger select

Trigger select bit

External trigger select

bit

Timer B2 mode register

Symbol

Address

When reset

TB2MR

039D16

00XX00002

Bit name

Function

Bit symbol

b5 b4

Operation mode select bit

0 0 : Timer mode

b1 b0

TMOD1

TMOD0

MR0

Invalid in timer mode

Can be “0” or “1”

MR2

MR1

MR3

0 0 : f1

0 1 : f8

1 0 : f32

1 1 : fC32

TCK1

TCK0

Count source select bit

Invalid in timer mode.

This bit can neither be set nor reset. When read in timer mode,

its content is indeterminate.

0 (Fixed to “0” in timer mode ; i = 0)

b7 b6

Invalid in three-phase PWM output mode

Figure 1.15.4. Timer mode registers in three-phase waveform mode

Three-phase motor driving waveform output mode (three-phase waveform mode)

Setting “1” in the mode select bit (bit 2 at 034816) shown in Figure 1.15.1 - causes three-phase waveform

mode that uses four timers A1, A2, A4, and B2 to be selected. As shown in Figure 1.15.4, set timers A1,

A2, and A4 in one-shot timer mode, set the trigger in timer B2, and set timer B2 in timer mode using the

respective timer mode registers.

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