SH7080_09 Datasheet, PDF (722/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 11 Multi-Function Timer Pulse Unit 2 (MTU2)
Operation when Error Occurs during Complementary PWM Mode Operation, and
Operation is Restarted in Normal Mode: Figure 11.157 shows an explanatory diagram of the
case where an error occurs in complementary PWM mode and operation is restarted in normal
mode after re-setting.
MTU2 module output
1
2
3
4
5
6
RESET TOCR TMDR TOER PFC TSTR
(CPWM) (1) (MTU2) (1)
7
8
9
10
11
12
13
14
Match Error PFC TSTR TMDR TIOR PFC TSTR
occurs (PORT) (0) (normal) (1 init (MTU2) (1)
0 out)
TIOC3A
TIOC3B
TIOC3D
Port output
PE8
Hi-Z
PE9
Hi-Z
PE11
Hi-Z
Figure 11.157 Error Occurrence in Complementary PWM Mode,
Recovery in Normal Mode
1. After a reset, MTU2 output is low and ports are in the high-impedance state.
2. Select the complementary PWM output level and cyclic output enabling/disabling with
TOCR.
3. Set complementary PWM.
4. Enable channel 3 and 4 output with TOER.
5. Set MTU2 output with the PFC.
6. The count operation is started by TSTR.
7. The complementary PWM waveform is output on compare-match occurrence.
8. An error occurs.
9. Set port output with the PFC and output the inverse of the active level.
10. The count operation is stopped by TSTR. (MTU2 output becomes the complementary PWM
output initial value.)
11. Set normal mode. (MTU2 output goes low.)
12. Initialize the pins with TIOR.
13. Set MTU2 output with the PFC.
14. Operation is restarted by TSTR.
Rev. 4.00 Dec. 15, 2009 Page 662 of 1558
REJ09B0181-0400