M32CSLASH86 datasheet(200/505 Pages) RENESAS

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Page 177

16. Three-Phase Motor Control Timer Functions

)

(

Three-Phase Output Buffer Register i(1) (i=0, 1)

Symbol

Address

After Reset

IDB0, IDB1

030A16, 030B16

XX11 11112

Bit Name

Bit

Symbol

DUi

DUBi

DVi

U-Phase Output Buffer i

DVBi

DWi

DWBi

(b7 - b6)

Function

Write output level

0: Active level

1: Inactive level

When read, the value of the three-

phase shift register is read.

U-Phase Output Buffer i

V-Phase Output Buffer i

W-Phase Output Buffer i

NOTES:

1. Values of the IDB0 and IDB1 registers are transferred to the three-phase output shift register by a

transfer trigger.

After the transfer trigger occurs, the values written in the IDB0 register determine each phase output

signal level first. Then the value written in the IDB1 register on the falling edge of the timers A1, A2

and A4 one-shot pulse determines each phase output signal level.

Reserved Bit

When read,

its content is indeterminate

Dead Time Timer(1, 2)

Symbol

Address

After Reset

DTT

030C16

Indeterminate

Function

Setting Range

1 to 255

If setting value is n, the timer stops when counting

n times a count source selected by the INV12 bit

after start trigger occurs. Positive or negative

phase, which changes from inactive level to active

level, shifts when the dead time timer stops.

NOTES:

1. Use the MOV instruction to set the DTT register.

2. The DTT register setting is enabled when the INV15 bit in the INVC1 register is set to "0" (dead time

enabled). No dead time can be set when the INV15 bit is set to "1" (dead time disabled). The INV06

bit in the INVC0 register determines start trigger of the DTT register.

Figure 16.4 IDB0 and IDB1 registers, DTT Register

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