7540 datasheet(164/366 Pages) RENESAS

164 / 366 page

2-88

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

APPLICATION

7540 Group

2.5 Timer Y and timer Z

Fig. 2.5.31 Setting method for programmable one-shot generation mode (3)

b7b0

Note: Pulse is output from TZOUT pin. After output, this bit is initialized to “0”.

b7b0

Note: When the INT0 pin one-shot trigger control bit is set to “valid”,

the INT0 interrupt can be accepted after this setting.

b7b0

q When the INT0 pin one-shot trigger control bit of PUM is set to “valid”,

the timer Z count is started by input of trigger to the INT0 pin.

Process 9: In order not to execute the no requested interrupt processing,

set “0” (no requested) to the timer Z interrupt request bit.

Interrupt request register 2 (IREQ2) [Address 3D16]

Process 10: When the interrupt is used, set “1” (interrupt enabled)

to the corresponding interrupt enable bit.

No Timer Z interrupt request issued

Interrupt control register 1 (ICON1) [Address 3E16]

INT0 interrupt enabled (Note)

One-shot start register (ONS) [Address 2A16]

Timer Z one-shot start (Note)

Process 11: Start counting of timer Z.

Interrupt edge selection register (INTEDGE) [Address 3A16]

INT0 interrupt edge selection bit

0: Falling edge active

1: Rising edge active

Interrupt request register 1 (IREQ1) [Address 3C16]

No INT0 interrupt request issued

Interrupt control register 2 (ICON2) [Address 3F16]

Timer Y interrupt enabled

q When the INT0 pin one-shot trigger control bit of PUM is set to “valid” and

the INT0 interrupt is used, set the following;

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