SH7144 Datasheet, PDF (301/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

11.4.8 Complementary PWM Mode
In the complementary PWM mode, three-phase output of non-overlapping positive and negative
PWM waveforms can be obtained by combining channels 3 and 4.
In complementary PWM mode, TIOC3B, TIOC3D, TIOC4A, TIOC4B, TIOC4C, and TIOC4D
pins function as PWM output pins, the TIOC3A pin can be set for toggle output synchronized with
the PWM period. TCNT_3 and TCNT_4 function as up/down counters.
Table 11.39 shows the PWM output pins used. Table 11.40 shows the settings of the registers
used.
A function to directly cut off the PWM output by using an external signal is supported as a port
function.
Table 11.39 Output Pins for Complementary PWM Mode
Channel
Output Pin
Description
3
TIOC3A
Toggle output synchronized with PWM period (or I/O port)
TIOC3B
PWM output pin 1
TIOC3C
I/O port*
TIOC3D
PWM output pin 1
(non-overlapping negative-phase waveform of PWM output 1)
4
TIOC4A
PWM output pin 2
TIOC4B
PWM output pin 3
TIOC4C
PWM output pin 2
(non-overlapping negative-phase waveform of PWM output 2)
TIOC4D
PWM output pin 3
(non-overlapping negative-phase waveform of PWM output 3)
Note: * Avoid setting the TIOC3C pin as a timer I/O pin in the complementary PWM mode.
Rev. 2.0, 09/02, page 261 of 732