HD64336901G Renesas Technology, HD64336901G Datasheet - Page 197

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

Figure 12.11 shows an example of buffer operation when the FTIOB pin is set to PWM mode and
GRD is set as the buffer register for GRB. TCNT is cleared by compare match A, and FTIOB
outputs 1 at compare match B and 0 at compare match A.
Due to the buffer operation, the FTIOB output level changes and the value of buffer register GRD
is transferred to GRB whenever compare match B occurs. This procedure is repeated every time
compare match B occurs.
Figures 12.12 and 12.13 show examples of the output of PWM waveforms with duty cycles of 0%
and 100%.
GRA
GRB
H'0000
GRD
GRB
FTIOB
GRA
GRB
GRC
GRD
H'0000
FTIOB
FTIOC
FTIOD
TCNT value
H'0200
Figure 12.11 Buffer Operation Example (Output Compare)
TCNT value
H'0200
Figure 12.10 PWM Mode Example (2)
H'0200
H'0450
Counter cleared by compare match A
H'0450
H'0450
H'0520
Rev. 1.00, 11/03, page 169 of 376
Time
H'0520
H'0520
Time