SH7261 datasheet(609/1348 Pages) RENESAS

609 / 1348 page

Section 12 Multi-Function Timer Pulse Unit 2 (MTU2)

Rev. 2.00 Sep. 07, 2007 Page 577 of 1312

REJ09B0320-0200

(7)

Operation when Error Occurs during PWM Mode 1 Operation, and Operation is

Restarted in Normal Mode

Figure 12.131 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.

Power-on

reset

PB, PC, PD*1

PB, PC, PD*2

Notes: 1. This pin is multiplexed with TIOC*A.

2. This pin is multiplexed with TIOC*B.

TMDR

(PWM1)

TOER

(1)

PFC

(MTU2)

TIOR

(1 init

0 out)

TSTR

(1)

Match

Error

occurs

PFC

(PORT)

TSTR

(0)

TMDR

(normal)

TIOR

(1 init

0 out)

PFC

(MTU2)

TSTR

(1)

MTU2

module output

TIOC*A

TIOC*B

Port output

Not initialized (TIOC*B)

High-Z

Figure 12.131 Error Occurrence in PWM Mode 1, Recovery in Normal Mode

After a power-on reset, MTU2 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 MTU2 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 MTU2 output with the PFC.

14. Operation is restarted by TSTR.

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