3822 datasheet(113/328 Pages) RENESAS

113 / 328 page

2.3 Timer X and timer Y

APPLICATION

3822 GROUP USER’S MANUAL

2–47

Fig. 2.3.8 Event counter mode operation example

CNTR1 interrupt

request bit

n16

000016

Time

Timer Y stop

control bit

CNTR1 interrupt

enable bit

Writing “1”

Writing “0”

Count stop

Count source

(P55/CNTR1 pin)

Count restart

CNTR1 active

edge switch bit

Timer Y interrupt

request bit

Timer Y interrupt

enable bit

CNTR0 interrupt request occurs at falling edge of the count source

Event counter mode operation example

•UF

•RL

•n

Count period

T(s) = 1

÷ count source frequency ! (the Y counter initial value + 1)

V : When the CNTR1 active edge switch bit is “1” ;

•Falling edge of the count source is valid.

•The CNTR1 interrupt request occurs at the rising edge of the output pulse.

1 : •Clearing by writing “0” to the timer Y interrupt request bit or the CNTR 1 interrupt request bit.

•Clearing by accepting the timer Y interrupt request and the CNTR 1 interrupt request when the

respective interrupt enable bits are “1.”

: Underflow

: Reload

: The Y counter initial value

3822 Datasheet(PDF) 113 Page - Renesas Technology Corp

3822 Datasheet(HTML) 113 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL