HD64F36049 datasheet(299/562 Pages) RENESAS

299 / 562 page

Section 14 Timer Z

Rev. 3.00 Mar. 15, 2006 Page 267 of 526

REJ09B0060-0300

• To output a 100%-duty cycle waveform, write H'0000 while previous GR value<

TCNT_0

≤ GRA_0

To change duty cycles while a waveform with a duty cycle of 0% or 100% is being

output, make sure the following procedure.

• To change duty cycles while a 0%-duty cycle waveform is being output, write to GR

while H'0000

≤ TCNT_1 < previous GR value

• To change duty cycles while a 100%-duty cycle waveform is being output, write to GR

while previous GR value< TCNT_0

≤ GRA_0

Note that changing from a 0%-duty cycle waveform to a 100%-duty cycle waveform

and vice versa is not possible.

b. Buffer operation is used and TPSC2 = TPSC1 = TPSC0 = 0

Write H'0000 or a value equal to or more than the GRA_0 value to the buffer register.

• To output a 0%-duty cycle waveform, write a value equal to or more than the GRA_0

value to the buffer register

• To output a 100%-duty cycle waveform, write H'0000 to the buffer register

For details on buffer operation, see section 14.4.8, Buffer Operation.

c. Buffer operation is not used and other than TPSC2 = TPSC1 = TPSC0 = 0

Write a value which satisfies GRA_0 + 1 < GR < H'FFFF to GR directly at the timing

shown below.

• To output a 0%-duty cycle waveform, write the value while H'0000 ≤ TCNT_1 <

previous GR value

• To output a 100%-duty cycle waveform, write the value while previous GR value<

TCNT_0

≤ GRA_0

To change duty cycles while a waveform with a duty cycle of 0% and 100% is being

output, the following procedure must be followed.

• To change duty cycles while a 0%-duty cycle waveform is being output, write to GR

while H'0000

≤ TCNT_1 < previous GR value

• To change duty cycles while a 100%-duty cycle waveform is being output, write to GR

while previous GR value< TCNT_0

≤ GRA_0

Note that changing from a 0%-duty cycle waveform to a 100%-duty cycle waveform

and vice versa is not possible.

HD64F36049 Datasheet(PDF) 299 Page - Renesas Technology Corp