SH7080 Datasheet, PDF (706/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 11 Multi-Function Timer Pulse Unit 2 (MTU2)
Operation when Error Occurs during PWM Mode 1 Operation, and Operation is Restarted
in Normal Mode: Figure 11.143 shows an explanatory diagram of the case where an error occurs
in PWM mode 1 and operation is restarted in normal mode after re-setting.
1
2
3
RESET TMDR TOER
(PWM1) (1)
4
5
6
TIOR PFC TSTR
(1 init (MTU2) (1)
0 out)
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)
MTU2 module output
TIOC*A
TIOC*B
Not initialized (TIOC*B)
Port output
PEn
High-Z
PEn
High-Z
n = 0 to 15
Figure 11.143 Error Occurrence in PWM Mode 1, Recovery in Normal Mode
1. After a reset, MTU2 output is low and ports are in the high-impedance state.
2. Set PWM mode 1.
3. For channels 3 and 4, enable output with TOER before initializing the pins with TIOR.
4. Initialize the pins with TIOR. (The example shows initial high output, with low output on
compare-match occurrence. In PWM mode 1, the TIOC*B side is not initialized.)
5. Set MTU2 output with the PFC.
6. The count operation is started by TSTR.
7. Output goes low 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.
11. Set normal mode.
12. Initialize the pins with TIOR.
13. Set MTU2 output with the PFC.
14. Operation is restarted by TSTR.
Rev. 3.00 May 17, 2007 Page 648 of 1582
REJ09B0181-0300