M16CSLASH29 datasheet(140/499 Pages) RENESAS

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12. Timer A

page 116

Figure 12.13 Example of 16-bit Pulse Width Modulator Operation

Figure 12.14 Example of 8-bit Pulse Width Modulator Operation

1 / fi X (2 – 1)

Count source

Input signal to

TAiIN pin

PWM pulse output

from TAiOUT pin

Trigger is not generated by this signal

“H”

“L”

IR bit in the

TAiIC register

fj : Frequency of count source

(f1, f2, f8, f32, fC32)

i = 0 to 4

NOTES:

1. n = 000016 to FFFE16.

2. This timing diagram is for the case where the TAi register is 0003 16, bits TAiTGH and TAiTGL in the ONSF or

TRGSR register is set to 00 2 (TAiIN pin input), the MR1 bit in the TAiMR register is set to 1 (rising edge), and

the MR2 bit in the TAiMR register is set to 1 (trigger selected by TAiTGH and TAiTGL bits).

1 / fj X n

Set to 0 upon accepting an interrupt request or by program

Count source (1)

Input signal to

TAiIN pin

Underflow signal of

8-bit prescaler (2)

PWM pulse output

from TAiOUT pin

“H”

“L”

Set to 0 upon accepting an interrupt request or by program

1 / fj X (m + 1) X (2 – 1)

1 / fj X (m + 1) X n

1 / fj X (m + 1)

IR bit in the

TAiIC register

fj : Frequency of count source

(f1, f2, f8, f32, fC32)

i = 0 to 4

NOTES:

1. The 8-bit prescaler counts the count source.

2. The 8-bit pulse width modulator counts the 8-bit prescaler's underflow signal.

3. m = 0016 to FF16; n = 0016 to FE16.

4. This timing diagram is for the case where the TAi register is 020216, bits TAiTGH and TAiTGL in the ONSF or

TRGSR register is set to 002 (TAiIN pin input), the MR1 bit in the TAiMR register is set to 0 (falling edge), and the

MR2 bit in the TAiMR register is set to 1 (trigger selected by bits TAiTGH and TAiTGL).

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