HD64F36034 datasheet(252/592 Pages) RENESAS

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Section 12 Timer Z

Rev. 4.00 Mar. 15, 2006 Page 220 of 556

REJ09B0026-0400

• 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

B. When 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_0value 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 12.4.8, Buffer Operation.

C. When 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 is 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.

D. Buffer operation is used and other than TPSC2 = TPSC1 = TPSC0 = 0

Write a value which satisfies GRA_0 + 1 < GR < H'FFFF to the buffer register. A

waveform with a duty cycle of 0% can be output. However, a waveform with a duty cycle

of 100% cannot be output using the buffer operation. Also, the buffer operation cannot be

used to change duty cycles while a waveform with a duty cycle of 100% is being output.

For details on buffer operation, see section 12.4.8, Buffer Operation.

HD64F36034 Datasheet(PDF) 252 Page - Renesas Technology Corp

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