
VII - 41
Chapter 7
16-bit Timers
16-bit Standard IGBT Output
7-8
16-bit Standard IGBT Output
(Duty can be changed consectively)
A trigger factor of the standard IGBT output activation can be selected from external interrupt pins 0 to 3.
Once started, the count operation is same as that of the standard PWM output.
7-8-1
Operation
nIGBT trigger selection
IGBT trigger can be selected from among IRQ0, IRQ1, IRQ2 and IRQ3 with TM7ICT0 and 1 flag of the
TM7MD2 register. Select one of IRQ0 to IRQ3 and set "1" (designation edge) to the T7ICEDG flag of the
TM7MD2 register. This trigger detects the input level before activation. Either "H" or "L" level can be
selected with the REGn flag of the IRQnICR register. When "1" (rising edge) is selected, count operation
continues while the trigger pin is "H". When "0" (falling edge) is selected, count operation continues while
the trigger pin is "L".
n16-bit Standard IGBT Output Operation (Timer 7)
Set the duty of IGBT “H” period to compare register 1 (TM7OC1), and detect the trigger generated by
external interrupt, which passed through external interrupt interface block. And then any IGBT waveform
can be formed. The IGBT cycle is full-count overflow duration of the 16-bit timer. The standard IGBT
output function can be used with only timer 7 among 16-bit timers.
Table 7-8-1
IGBT Output Pin
Timer 7
IGBT output pin
TM7IO output pin
(P14)
TM7IO output pin
(P51)
Table 7-8-2
IGBT Trigger
Timer 7 mode register 2
External interrupt n
control register
(IRQnICR)
T7ICT1-0
T7ICEDG
REDGn (bp5)
IRQ0 falling edge
00 (IRQ0)
1
0
IRQ0 rising edge
00 (IRQ0)
1
IRQ1 falling edge
01 (IRQ1)
1
0
IRQ1 rising edge
01 (IRQ1)
1
IRQ2 falling edge
10 (IRQ2)
1
0
IRQ2 rising edge
10 (IRQ2)
1
IRQ3 falling edge
11 (IRQ3)
1
0
IRQ3 rising edge
11 (IRQ3)
1