SH7014 datasheet(308/754 Pages) RENESAS

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10. Multifunction Timer Pulse Unit (MTU)

Rev.5.00 Sep. 27, 2007 Page 274 of 716

REJ09B0398-0500

Table 10.14 Mode Transition Combinations

After

Before

Normal

PWM1

PWM2

PCM

Normal

(1)

(2)

(3)

(4)

PWM1

(5)

(6)

(7)

(8)

PWM2

(9)

(10)

(11)

(12)

PCM

(13)

(14)

(15)

(16)

Legend:

Normal: Normal mode

PWM1: PWM mode 1

PWM2: PWM mode 2

PCM:

Phase counting modes 1 to 4

The above abbreviations are used in some places in following descriptions.

10.8.4

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.

Note:

Channel number is substituted for * indicated in this article.

Pin initialization procedures are described below for the numbered combinations in table 10.14.

The active level is assumed to be low.

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