SH7101 datasheet(268/560 Pages) RENESAS

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Section 8 Multifunction Timer Pulse Unit (MTU)

Rev.1.00 Sep. 18, 2008 Page 234 of 522

REJ09B0069-0100

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. 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 8.43.

Table 8.43

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

PCM

(17)

(18)

(19)

(20)

None

CPWM

(21)

(22)

None

(23) (24)

(25)

RPWM

(26)

(27)

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.

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