SH7211 Datasheet, PDF (599/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 10 Multi-Function Timer Pulse Unit 2 (MTU2)
(7) Operation when Error Occurs during PWM Mode 1 Operation, and Operation is
Restarted in Normal Mode
Figure 10.141 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)
MTU2 module output
TIOC*A
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)
TIOC*B
Not initialized (TIOC*B)
Port output
PEn
High-Z
PEn
High-Z
n = 0 to 15
Figure 10.141 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. 2.00 May. 08, 2008 Page 575 of 1200
REJ09B0344-0200