SH7014 datasheet(313/754 Pages) RENESAS

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10. Multifunction Timer Pulse Unit (MTU)

Rev.5.00 Sep. 27, 2007 Page 279 of 716

REJ09B0398-0500

(5) Operation when Error Occurs during PWM Mode 1 Operation, and Operation is

Restarted in Normal Mode: Figure 10.64 shows an explanatory diagram of the case where an

error occurs in PWM mode 1 and operation is restarted in normal mode after re-setting.

RESET

TMDR

(PWM1)

PFC

(MTU)

TIOR

(1 init

0 out)

TSTR

(1)

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

Hi-Z

• Not initialized (TIOC*B)

Note: n = 0 to 15

Figure 10.64 Error Occurrence in PWM Mode 1, Recovery in Normal Mode

1. After a reset, MTU output is low and ports are in the high-impedance state.

2. Set PWM mode 1.

3. Initialize the pins with TIOR. (The example shows initial high output, with low output on

compare-match occurrence. In PWM mode 1, the TIOC*B side is not initialized.)

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.

SH7014 Datasheet(PDF) 313 Page - Renesas Technology Corp

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