7702 datasheet(133/217 Pages) RENESAS

133 / 217 page

TIMER A

7702/7703 Group User’s Manual

5–45

5.6 Pulse width modulation (PWM) mode

Fig. 5.6.4 Operation example of 16-bit pulse width modulator

Fig. 5.6.5 Operation example of 16-bit pulse width modulator (when counter value is updated during

pulse output)

1 / fi ! (216 – 1)

1 / fi ! (n)

Count source

TAiIN pin’s input signal

PWM pulse output

from TAiOUT pin

Note: The above applies when reload register (n) = “000316” and an external trigger (rising of TAiIN

pin’s input signal) is selected.

Trigger is not generated by this signal.

“H”

“L”

Timer Ai interrupt

request bit

“1”

“0”

Cleared to “0” when interrupt request is accepted

or cleared by software.

fi: Frequency of count source

(f2, f16, f64, or f512)

When an arbitrary value is set to the timer Ai register after setting “000016” to it, the timing at which the PWM pulse goes “H”

depends on the timing at which the new value is set.

Note: The above applies when an external trigger (rising of TAiIN pin’s input signal) is selected.

FFFE16

000116

TAiIN pin’s

input signal

“H”

“L”

“H”

“L”

(1 / fi) ! (216 –1)

(216 –1) – n

(1 / fi) ! (216 –1)

PWM pulse

output from

TAiOUT pin

“000016” is set to timer Ai

“200016” is set to timer Ai

200016

“FFFE16” is set to timer Ai

n = Reload register’s contents

fi: Frequency of count source

(f2, f16, f64, or f512)

Restarts counting.

Stops

counting.

Time

(1 / Pfi) ! (2 –1)

7702 Datasheet(PDF) 133 Page - Renesas Technology Corp

7702 Datasheet(HTML) 133 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