SH7041A datasheet(464/923 Pages) RENESAS

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426

(13) Operation when Error Occurs during PWM Mode 2 Operation, and Operation is

Restarted in Normal Mode: Figure 12.108 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.

RESET

TMDR

(PWM2)

TIOR

(1 init

0 out)

TSTR

(1)

PFC

(MTU)

Match

Error

occurs

PFC

(PORT)

TSTR

(0)

TMDR

(normal)

TIOR

(1 init

0 out)

PFC

(MTU)

TSTR

(1)

MTU output

TIOC*A

TIOC*B

Port output

PEn

• Not initialized (cycle register)

n=0 to 15

High-Z

Figure 12.108 Error Occurrence in PWM Mode 2, Recovery in Normal Mode

1.After a reset, MTU 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 MTU output with the PFC.

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 PFC 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 MTU output with the PFC.

13.Operation is restarted by TSTR.

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