M16C28 Datasheet, PDF (145/423 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/28 Group (M16C/28, M16C/28B)
12. Timer
Three-phase PWM Control Register 1 ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
0
Symbol
INVC1
Address
034916
After Reset
0016
Bit Symbol
Bit Name
Function
RW
Timer A1, A2, A4 start
0: Timer B2 underflow
INV10
trigger signal select bit
1: Timer B2 underflow and write to the
RW
TB2 register
INV11
Timer A1-1, A2-1, A4-1
0: Three-phase mode 0
control bit
(2) _{1: Three-phase mode 1}
(3) _RW
INV12
Dead time timer count
source select bit
0 : f1 or f2
1 : f1 divided by 2 or f2 divided by 2
RW
INV13
Carrier wave detect flag 0: Timer Reload control signal is set to "0"
(4) ^{1: Timer Reload control signal is set to "1"}
RO
INV14
INV15
INV16
Output polarity control bit
Dead time invalid bit
Dead time timer trigger
select bit
0 : Output waveform “L” active
1 : Output waveform “H” active
RW
0: Dead time timer enabled
1: Dead time timer disabled
RW
0: Falling edge of timer A4, A1 or A2
one-shot pulse
1: Rising edge of three-phase output shift ^RW
register (U, V or W phase) output
(5)
Reserved bit
(b7)
This bit should be set to “0”
RW
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.
Item
INV11=0
INV11=1
Mode
TA11, TA21, TA41 registers
Three-phase mode 0
Not Used
Three-phase mode 1
Used
INV00 bit, INV01 bit
INV13 bit
Has no effect. ICTB2 counted every time
timer B2 underflows regardless of
whether the INV00 to INV01 bits are set.
Has no effect
Effect
Effective when INV11 bit is “1” and
INV06 bit is “0”
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 “0” (triangular wave modulation mode) and the INV11 bit
is “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).
Figure 12.27 INVC1 Register
Rev. 2.00 Jan. 31, 2007 ^{page 125} of 385
REJ09B0047-0200