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Section 11 Multi-Function Timer Pulse Unit 2
R01UH0134EJ0400 Rev. 4.00 Page 631 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
(13) Operation when Error Occurs during PWM Mode 2 Operation, and Operation is
Restarted in Normal Mode
Figure 11.127 shows an explanatory diagram of the case where an error occurs in PWM mode 2
and operation is restarted in normal mode after re-setting.
1
RESET
2
TMDR
(PWM2)
3
TIOR
(1 init
0 out)
5
TSTR
(1)
4
PFC
(MTU2)
6
Match
7
Error
occurs
8
PFC
(PORT)
9
TSTR
(0)
10
TMDR
(normal)
11
TIOR
(1 init
0 out)
12
PFC
(MTU2)
13
TSTR
(1)
MTU2 module output
TIOC*A
TIOC*B
Port output
PEn
PEn
Not initialized (cycle register)
n = 0 to 15
High-Z
High-Z
Figure 11.127 Error Occurrence in PWM Mode 2, Recovery in Normal Mode
1. After a reset, the module output is low and ports are in the high-impedance state.
2. Set PWM mode 2.
3. Initialize the pins with TIOR. (The example shows initial high output, with low output on
compare-match occurrence. In PWM mode 2, the cycle register pins are not initialized. In the
example, TIOC *A is the cycle register.)
4. Set the multi-function timer pulse unit 2 output with the general I/O port.
5. The count operation is started by TSTR.
6. Output goes low on compare-match occurrence.
7. An error occurs.
8. Set port output with the general I/O port and output the inverse of the active level.
9. The count operation is stopped by TSTR.
10. Set normal mode.
11. Initialize the pins with TIOR.
12. Set the multi-function timer pulse unit 2 output with the general I/O port.
13. Operation is restarted by TSTR.