HD64F7047 datasheet(342/764 Pages) RENESAS

342 / 764 page

Rev. 2.00, 09/04, page 302 of 720

Operation when Error Occurs during Reset-Synchronous PWM Mode Operation, and

Operation is Restarted in Normal Mode: Figure 10.110 shows an explanatory diagram of the

case where an error occurs in reset-synchronous PWM mode and operation is restarted in normal

mode after re-setting.

RESET

TOCR

TMDR

(CPWM)

PFC

(MTU)

TOER

(1)

TSTR

(1)

Match

Error

occurs

PFC

(PORT)

TSTR

(0)

TMDR

(normal)

TIOR

(1 init

0 out)

PFC

(MTU)

TSTR

(1)

MTU module

output

TIOC3A

TIOC3B

TIOC3D

Port output

PE9

PE8

PE11

High-Z

Figure 10.110 Error Occurrence in Reset-Synchronous PWM Mode,

Recovery in Normal Mode

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

Select the reset-synchronous PWM output level and cyclic output enabling/disabling with

TOCR.

Set reset-synchronous PWM.

Enable channel 3 and 4 output with TOER.

Set MTU output with the PFC.

The count operation is started by TSTR.

The reset-synchronous PWM waveform is output 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. (MTU output becomes the reset-synchronous PWM

output initial value.)

11. Set normal mode. (MTU positive phase output is low, and negative phase output is high.)

12. Initialize the pins with TIOR.

13. Set MTU output with the PFC.

14. Operation is restarted by TSTR.

HD64F7047 Datasheet(PDF) 342 Page - Renesas Technology Corp

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