Renesas M16C User Manual

Rev.1.10    Jul 01, 2005    page 121 of 318
REJ09B0124-0110

M16C/6N Group (M16C/6NK, M16C/6NM)

13. Three-Phase Motor Control Timer Function

This document is under development and its contents are subject to change.

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

(1)

 

    Symbol

      Address

After Reset 

IDB0, IDB1    

01CAh, 01CBh 

      00h

b7

b6

b5

b4

b3

b2

b1

b0

RW

RW

RW

RW

RW

RW

RW

RO

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

V-Phase Output Buffer i

W-Phase Output Buffer i

W-Phase Output Buffer i

NOTE: 

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 first. Then the value written in the IDB1 register on the falling edge of timers A1, A2 and A4 one-shot 
pulse determines each phase output signal.

Reserved Bit

Set to "0"

0 0

Dead Time Timer 

(1) (2)

Symbol

Address

 After Reset 

   DTT 

 01CCh

Indeterminate 

RW

WO

Function

b0

Setting Range

1 to 255

b7

If setting value is 

n

, the timer stops when counting 

n

 times a count source selected by the INV12 bit 

in the INVC1 register 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 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.