Three-Phase Output Buffer Register I (Idbi) (I = 0, 1); Dead Time Timer (Dtt) - Renesas M16C/64C User Manual

M16C/64C Group
19.2.5

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

Three-Phase Output Buffer Register i (i = 0, 1)
b7 b6 b5 b4 b3 b2 b1
Values of registers IDB0 and IDB1 are transferred to the three-phase output shift registers in response
to a transfer trigger. After the transfer trigger occurs, the IDB0 register value determines each phase
output signal (internal signal) first. Then, the IDB1 register value on the falling edge of timers A1, A2,
and A4 one-shot pulse determines each phase output signal (internal signal).
19.2.6

Dead Time Timer (DTT)

Dead Time Timer
b7
Use the MOV instruction to set the DTT register.
The DTT register acts as a one-shot timer which delays the timing for a turn-on signal to be switched to
its active level in order to prevent the upper and lower transistors from being turned on simultaneously.
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).
Select a trigger by the INV16 bit in the INVC1 register, and a count source by the INV12 bit in the
INVC1 register.
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
b0 Symbol
IDB0
IDB1
Bit Symbol Bit Name
DUi U-phase output buffer i
DUBi U-phase output buffer i
DVi V-phase output buffer i
DVBi V-phase output buffer i
DWi W-phase output buffer i
DWBi W-phase output buffer i
—
No register bits. If necessary, set to 0. The read value is undefined.
(b7-b6)
Symbol
b0
DTT
If a setting value is n, the count source is counted n times
after the start trigger occurs, and then the timer stops.
19. Three-Phase Motor Control Timer Function
Address
030Ah
030Bh
Set the output logical value of the three-
phase output shift registers. The set value
is reflected in each turn-on signal as
follows:
0 : Active (on)
1 : Inactive (off)
When read, the values of the three-phase
output shift registers are read.
Address
030Ch
Function
Reset Value
XX11 1111b
XX11 1111b
Function
Reset Value
Undefined
Setting Range
1 to 255
Page 338 of 807
RW
RW
RW
RW
RW
RW
RW
—
RW
WO