M32C83T datasheet(174/527 Pages) RENESAS

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Page 151

14. Timer (Timer A)

)

(

1 / fj x (216 – 1)

Count source

Input signal

to TAiIN pin

PWM pulse output

from TAiOUT pin

When the reload register is set to "000316" and an external

trigger (rising edge of input signal to the TAiIN pin) is selected

No trigger is generated 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

(f1, f8, f2n(2), fC32)

NOTES:

1. n = 000016 to FFFE16.

2. 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(1)

i=0 to 4

Count source(1)

Input signal 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(4), 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. m = 0016 to FF16, n = 0016 to FE16

4. 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 (falling edge of input signal to the TAiIN pin) is selected

1 / fj x (m + 1) x (28 – 1)

1 / fj x (m + 1) x n (3)

1 / fj x (m + 1) (3)

i=0 to 4

Figure 14.14 16-bit Pulse Width Modulator Operation

Figure 14.15 8-bit Pulse Width Modulator Operation

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