SH7018 Datasheet, PDF (174/431 Pages) Renesas Technology Corp – SuperH™ RISC engine

8.8.2 Reset Start Operation
The MTU output pins (TIOC*) are initialized low by a reset and in standby mode. Since MTU pin
function selection is performed by the pin function controller (PFC), when the PFC is set, the
MTU pin states at that point are output to the ports. When MTU output is selected by the PFC
immediately after a reset, the MTU output initial level, low, is output directly at the port. When
the active level is low, the system will operate at this point, and therefore the PFC setting should
be made after initialization of the MTU output pins is completed.
Note: * Represents the channel number and port symbol.
8.8.3 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. 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 three operating modes, as stated above. There are thus 9 mode transition
combinations. Possible mode transition combinations are shown in table 8.9.
Table 8.9 Mode Transition Combinations
After
Before
Normal
PWM1
PWM2
Normal
(1)
(2)
(3)
PWM1
(4)
(5)
(6)
PWM2
(7)
(8)
(9)
Legend:
Normal: Normal mode
PWM1: PWM1 mode
PWM2: PWM2 mode
The above abbreviations are used in some places in the following descriptions.
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