SH7261 datasheet(602/1348 Pages) RENESAS

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

Rev. 2.00 Sep. 07, 2007 Page 570 of 1312

REJ09B0320-0200

12.8.4

Overview of Initialization Procedures and Mode Transitions in Case of Error

during Operation, etc.

• When making a transition to a mode (Normal, PWM1, PWM2, PCM) in which the pin output

level is selected by the timer I/O control register (TIOR) setting, initialize the pins by means of

a TIOR setting.

• In PWM mode 1, since a waveform is not output to the TIOC*B (TIOC *D) pin, setting TIOR

will not initialize the pins. If initialization is required, carry it out in normal mode, then switch

to PWM mode 1.

• In PWM mode 2, since a waveform is not output to the cycle register pin, setting TIOR will

not initialize the pins. If initialization is required, carry it out in normal mode, then switch to

PWM mode 2.

• In normal mode or PWM mode 2, if TGRC and TGRD operate as buffer registers, setting

TIOR will not initialize the buffer register pins. If initialization is required, clear buffer mode,

carry out initialization, then set buffer mode again.

• In PWM mode 1, if either TGRC or TGRD operates as a buffer register, setting TIOR will not

initialize the TGRC pin. To initialize the TGRC pin, clear buffer mode, carry out initialization,

then set buffer mode again.

• When making a transition to a mode (CPWM, RPWM) in which the pin output level is

selected by the timer output control register (TOCR) setting, switch to normal mode and

perform initialization with TIOR, then restore TIOR to its initial value, and temporarily disable

channel 3 and 4 output with the timer output master enable register (TOER). Then operate the

unit in accordance with the mode setting procedure (TOCR setting, TMDR setting, TOER

setting).

Note:

Channel number is substituted for * indicated in this article.

Pin initialization procedures are described below for the numbered combinations in table 12.59.

The active level is assumed to be low.

(1)

Operation when Error Occurs during Normal Mode Operation, and Operation is

Restarted in Normal Mode

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