SH7014 datasheet(321/754 Pages) RENESAS

321 / 754 page

10. Multifunction Timer Pulse Unit (MTU)

Rev.5.00 Sep. 27, 2007 Page 287 of 716

REJ09B0398-0500

(13) Operation when Error Occurs during Phase Counting Mode Operation, and Operation

is Restarted in Normal Mode: Figure 10.72 shows an explanatory diagram of the case where an

error occurs in phase counting mode and operation is restarted in normal mode after re-setting.

RESET

TMDR

(PCM)

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

Hi-Z

Note: n = 0 to 15

Figure 10.72 Error Occurrence in Phase Counting Mode, Recovery in Normal Mode

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

2. Set phase counting mode.

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

compare-match occurrence.)

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 in 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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