SH7101 datasheet(263/486 Pages) RENESAS

263 / 486 page

8. Multi-Function Timer Pulse Unit (MTU)

Rev.2.00 Sep. 27, 2007 Page 229 of 448

REJ09B0394-0200

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

Restarted in Normal Mode: Figure 8.90 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)

TOER

(1)

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 module

output

TIOC*A

TIOC*B

Port output

PEn

• Not initialized (TIOC*B)

Note: n = 0 to 15

Hi-Z

Figure 8.90 Error Occurrence in PWM Mode 1, Recovery in Normal Mode

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

Set PWM mode 1.

For channels 3 and 4, enable output with TOER before initializing the pins with TIOR.

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.)

Set MTU output with the PFC.

The count operation is started by TSTR.

Output goes low on compare-match occurrence.

An error occurs.

Set port output with the PFC and output the inverse of the active level.

10. The count operation is stopped by TSTR.

11. Set normal mode.

12. Initialize the pins with TIOR.

13. Set MTU output with the PFC.

14. Operation is restarted by TSTR.

SH7101 Datasheet(PDF) 263 Page - Renesas Technology Corp

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