M16CSLASH29 datasheet(152/499 Pages) RENESAS

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12. Timer (Three-phase Motor Control Timer Function)

page 128

Figure 12.27 INVC1 Register

Three-phase PWM Control Register 1 (1)

Symbol

Address

After Reset

INVC1

034916

0016

b7 b6 b5 b4 b3 b2 b1 b0

Timer A1, A2, A4 start

trigger signal select bit

INV10

Bit Symbol

Bit Name

Function

INV11

Timer A1-1, A2-1, A4-1

control bit

INV12

Dead time timer count

source select bit

INV14

Output polarity control bit

(b7)

Reserved bit

INV16

INV15

Dead time invalid bit

INV13

Carrier wave detect flag (5)

0: Timer B2 underflow

1: Timer B2 underflow and write to the

TB2 register(2)

0: Three-phase mode 0

1: Three-phase mode 1

0: f1 or f2

1: f1 divided by 2 or f2 divided by 2

0: Timer Reload control signal is set to 0

1: Timer Reload control signal is set to 1

0 : Output waveform “L” active

1 : Output waveform “H” active

0: Dead time timer enabled

1: Dead time timer disabled

Set to 0

(3)

Item

Mode

TA11, TA21, TA41 registers

INV00 bit, INV01 bit

INV13 bit

INV11=0

Three-phase mode 1

Three-phase mode 0

Not Used

Has no effect. ICTB2 counted every time

timer B2 underflows regardless of

whether bits INV00 and INV01 are set

Has no effect

INV11=1

Used

Effect

Effective when INV11 bit is 1 and

INV06 bit is 0

(4)

4. If the INV06 bit is 1 (sawtooth wave modulation mode), set this bit to 0 (three-phase mode 0). Also, if the INV11 bit is

0, set the PWCON bit to 0 (timer B2 reloaded by a timer B2 underflow).

5. The INV13 bit is effective only when the INV06 bit is set to 0 (triangular wave modulation mode) and the INV11 bit is

set to 1 (three-phase mode 1).

6. If all of the following conditions hold true, set the INV16 bit to 1 (dead time timer triggered by the rising edge of three-

phase output shift register output)

• The INV15 bit is 0 (dead time timer enabled)

• When the INV03 bit is set to 1 (three-phase motor control timer output enabled), the Dij bit and DiBj bit (i:U, V, or

W, j: 0 to 1) have always different values (the positive-phase and negative-phase always output different levels

during the period other than dead time).

Conversely, if either one of the above conditions holds false, set the INV16 bit to 0 (dead time timer triggered by the

falling edge of one-shot pulse).

NOTES:

1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enable). Note also that this register

can only be rewritten when timers A1, A2, A4 and B2 are idle.

2. A start trigger is generated by writing to the TB2 register only while timer B2 stops.

3. The effects of the INV11 bit are described in the table below.

0: Falling edge of timer A4, A1 or A2

one-shot pulse

1: Rising edge of three-phase output shift

Dead time timer trigger

select bit

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