7540 datasheet(127/366 Pages) RENESAS

127 / 366 page

2-51

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

7540 Group

APPLICATION

2.4 Timer X

Fig. 2.4.14 Setting method for pulse output mode (2)

b7b0

Process 6: Set the count value to timer X.

• Set the count value to prescaler X and timer X

Prescaler X (PREX) (Address 2C16)

Count value

Timer X (TX) (Address 2D16)

Process 7: In order not to execute the no requested interrupt processing, set “0” (no requested)

to the timer X interrupt request bit.

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

Process 8: When the interrupt is used, set “1” (interrupt enabled) to the timer X

interrupt enable bit.

No timer X interrupt request issued

Timer X mode register (TXM) [Address 2B16]

Timer X count start

Process 9: Start counting of timer X.

Count value

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

Timer X interrupt enabled

Note: f(XIN) can be used only when a ceramic resonator or an on-chip oscillator is used.

Do not use f(XIN) at RC oscillation.

Process 5: Set timer count source set register.

Timer count source set register (TCSS) [Address 2E16]

Timer X count source selection bits

b1 b0

0 0 : f(XIN)/16

0 1 : f(XIN)/2

1 0 : f(XIN) (Note)

1 1 : Not available

7540 Datasheet(PDF) 127 Page - Renesas Technology Corp