SH7101 datasheet(280/560 Pages) RENESAS

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Section 8 Multifunction Timer Pulse Unit (MTU)

Rev.1.00 Sep. 18, 2008 Page 246 of 522

REJ09B0069-0100

(13) Operation when Error Occurs during PWM Mode 2 Operation, and Operation is

Restarted in Normal Mode

Figure 8.96 shows an explanatory diagram of the case where an error occurs in PWM mode 2 and

operation is restarted in normal mode after re-setting.

RESET

TMDR

(PWM2)

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 module

output

TIOC*A

TIOC*B

Port output

PEn

• Not initialized (cycle register)

n=0 to 15

Hi-Z

Figure 8.96 Error Occurrence in PWM Mode 2, Recovery in Normal Mode

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

Set PWM mode 2.

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

compare-match occurrence. In PWM mode 2, the cycle register pins are not initialized. In the

example, TIOC *A is the cycle register.)

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.

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.

SH7101 Datasheet(PDF) 280 Page - Renesas Technology Corp

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