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Section 18 Multi-Function Timer Pulse Unit (MTU)
Rev. 4.00 Sep. 14, 2005 Page 642 of 982
REJ09B0023-0400
18.8.3 Operation in Case of Re-Setting Due to Error During Operation, etc.
If an error occurs during MTU operation, MTU output should be cut by the system. Cutoff is
performed by switching the pin output to port output with the PFC and outputting the inverse of
the active level. For large-current pins, output can also be cut by hardware, using port output
enable (POE). The pin initialization procedures for re-setting due to an error during operation, etc.,
and the procedures for restarting in a different mode after re-setting, are shown below.
The MTU has six operating modes, as stated above. There are thus 36 mode transition
combinations, but some transitions are not available with certain channel and mode combinations.
Possible mode transition combinations are shown in table 18.43.
Table 18.43 Mode Transition Combinations
After
Before Normal PWM1 PWM2 PCM CPWM RPWM
Normal (1) (2) (3) (4) (5) (6)
PWM1 (7) (8) (9) (10) (11) (12)
PWM2 (13) (14) (15) (16) None None
PCM (17) (18) (19) (20) None None
CPWM (21) (22) None None (23) (24) (25)
RPWM (26) (27) None None (28) (29)
[Legend]
Normal: Normal mode
PWM1: PWM mode 1
PWM2: PWM mode 2
PCM: Phase counting modes 1 to 4
CPWM: Complementary PWM mode
RPWM: Reset-synchronous PWM mode
The above abbreviations are used in some places in following descriptions.