M32CSLASH86 datasheet(185/505 Pages) RENESAS

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Page 162

15. Timer (Timer A)

)

(

1 / fj X (216 – 1)

Count source

Signal applied

to TAiIN pin

PWM pulse output

from TAiOUT pin

When the reload register is set to "000316" and an external trigger (on rising edge

of a signal applied to the TAiIN pin) is selected

No trigger occurs by this signal

“H”

“L”

IR bit in TAiIC register

“1”

“0”

Set to "0" by an interrupt request acknowledgement or by program

fj : Count source frequency

(f1, f8, f2n(1), fC32)

NOTES:

1. The CNT3 to CNT0 bits in the TCSPR register select no division (n=0) or divide-by-2n (n=1 to 15).

1 / fi X n

i=0 to 4

n=000016 to FFFE16

Count source(1)

Signal applied to

TAiIN pin

Underflow signal of

8-bit prescaler(2)

PWM pulse output

from TAiOUT pin

“H”

“L”

“1”

“0”

IR bit in TAiIC register

Set to "0" by an interrupt request

acknowledgement or by program

fj : Count source frequency

(f1, f8, f2n(3), fC32)

NOTES:

1. 8-bit prescaler counts a count source.

2. 8-bit pulse width modulator counts underflow signals of the 8-bit prescaler.

3. The CNT3 to CNT0 bits in the TCSPR register select no division (n=0) or divide-by-2n (n=1 to 15).

When 8 high-order bits of the reload register are set to "0216", 8 low-order bits of

the reload register are set to "0216" and an external trigger (on falling edge of a

signal applied to the TAiIN pin) is selected

1 / fj X (m + 1) X (28 – 1)

1 / fj X (m + 1) X n

1 / fj X (m + 1)

i=0 to 4

m=0016 to FF16, n=0016 to FE16

Figure 15.14 16-bit Pulse Width Modulator Operation

Figure 15.15 8-bit Pulse Width Modulator Operation

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