Renesas M16C/60 Series Hardware Manual page 138

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M16C/6N5 Group
Three-phase PWM control register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Note 1: Write to this register after setting the PRC1 bit of PRCR register to "1" (write enable). Note also that INV00 to INV02,
INV04 and INV06 bits can only be rewritten when timers A1, A2, A4 and B2 are idle.
Note 2: Effective when the INV11 bit is "1" (three-phase mode 1). If INV11 is "0" (three-phase mode 0), the ICTB2 counter is
incremented by "1" each time the timer B2 underflows, regardless of whether the INV00 and INV01 bits are set.
Note 3: If this bit needs to be set to "1", set any value in the ICTB2 register before writing to it.
Note 4: Setting the INV02 bit to "1" activates the dead time timer, U/V/W-phase output control circuits and ICTB2 counter.
Note 5: All of the U, U, V, V, W and W pins are placed in the high-impedance state by setting the INV02 bit to 1 (three-phase
motor control timer function) and setting the INV03 bit to "0" (three-phase motor control timer output disable).
Note 6: The INV03 bit is set to "0" in the following cases:
When reset
When positive and negative go active simultaneously while INV04 bit is "1"
When set to "0" in a program
When input on the NMI pin changes state from "H" to "L" (The INV03 bit cannot be set to "1" when NMI input is "L".)
Note 7: Can only be set by writing "0" in a program, and cannot be set to "1".
Note 8: The effects of the INV06 bit are described in the table below.
Mode
Timing at which transferred from IDB0 to
IDB1 registers to three-phase output shift
register
Timing at which dead time timer trigger is
generated when INV16 bit is "0"
INV13 bit
Transfer trigger: Timer B2 underflow, write to the INV07 bit or write to the TB2 register when INV10 is "1"
Note 9: If the INV06 bit is "1", set the INV11 bit to "0" (three-phase mode 0) and set the PWCON bit to "0" (timer B2 reloaded
by a timer B2 underflow).
Figure 1.14.2 INVC0 Register
Rev.1.00 2003.05.30 page 124
Symbol
INVC0
Bit symbol
Effective interrupt output
INV00
polarity select bit
Effective interrupt output
specification bit
INV01
Mode select bit (Note 4)
INV02
INV03
Output control bit (Note 6)
Positive and negative
phases concurrent output
INV04
disable bit
Positive and negative
INV05
phases concurrent output
detect flag
Modulation mode select
INV06
bit
INV07 Software trigger select bit
Item
Triangular wave modulation mode
Transferred only once synchronously
with the transfer trigger after writing to
the IDB0 to IDB1 registers
Synchronous with the falling edge of
timer A1, A2, or A4 one-shot pulse
Effective when INV11 is "1" and INV06
is "0"
Three-phase Motor Control Timer Function
Address After reset
01C8 00
16 16
Bit name
0: ICTB2 counter incremented by 1 at
odd-numbered occurrences of a timer
B2 underflow
1: ICTB2 counter incremented by 1 at
even-numbered occurrences of a timer
(Note 2)
B2 underflow
0: ICTB2 counter incremented by 1 at a
timer B2 underflow
1: Selected by INV00 bit
(Notes 2, 3)
0: Three-phase motor control timer
function unused
1: Three-phase motor control timer
function
0: Three-phase motor control timer output
disabled
1: Three-phase motor control timer output
enabled
0: Simultaneous active output enabled
1: Simultaneous active output disabled
0: Not detected yet
1: Already detected
0: Triangular wave modulation mode
(Note 8)
1: Sawtooth wave modulation mode (Note 9)
Setting this bit to "1" generates a transfer
trigger. If the INV06 bit is "1", a trigger for
the dead time timer is also generated.
The value of this bit when read is "0".
INV06 = 0
Description
RW
RW
RW
(Note 5)
RW
(Note 5)
RW
RW
(Note 7)
RW
RW
RW
INV06 = 1
Sawtooth wave modulation mode
Transferred every transfer trigger
Synchronous with the transfer
trigger and the falling edge of timer
A1, A2, or A4 one-shot pulse
Has no effect