SH7046 Datasheet, PDF (328/611 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7046 Series

Section 10 Multi-Function Timer Pulse Unit (MTU)
(21) Operation when Error Occurs during Complementary PWM Mode Operation, and
Operation is Restarted in Normal Mode: Figure 10.105 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.
MTU module
output
TIOC3A
1
2
3
4
RESET TOCR TMDR TOER
(CPWM) (1)
5
PFC
(MTU)
6
TSTR
(1)
7
8
9
10
11
12
Match Error PFC TSTR TMDR TIOR
occurs (PORT) (0) (normal) (1 init
0 out)
13
PFC
(MTU)
14
TSTR
(1)
TIOC3B
TIOC3D
Port output
PE8
PE9
High-Z
High-Z
PE11
High-Z
Figure 10.105 Error Occurrence in Complementary PWM Mode, Recovery in
Normal Mode
1. After a reset, MTU 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 MTU 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. (MTU output becomes the complementary PWM
output initial value.)
11. Set normal mode. (MTU output goes low.)
12. Initialize the pins with TIOR.
13. Set MTU output with the PFC.
14. Operation is restarted by TSTR.
Rev. 4.00 Dec 05, 2005 page 284 of 564
REJ09B0270-0400