m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 308

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Overview
Specifications
Operation
3.2 Variable-Period Variable-Duty PWM Output
In this process, Timer A0 and A1 are used to generate variable-period, variable-duty PWM out-
put. Figure 3.2.1 shows the operation timing, Figure 3.2.2 shows the connection diagram, and
Figures 3.2.3 and 3.2.4 show the set-up procedure.
Use the following peripheral functions:
(1) Set timer A0 in timer mode, and set timer A1 in one-shot timer mode with pulse-output function.
(2) Set 1 ms, the PWM period, to timer A0. Set 500 µs, the width of PWM “H” pulse, to timer A1.
(3) Connect a 16-MHz oscillator to X
(1) Setting the count start flag to “1” causes the counter of timer A0 to begin counting. The
(2) If the counter of timer A0 underflows, the counter reloads the content of the reload register
(3) An underflow in timer A0 triggers the counter of timer A1 and causes it to begin counting. When
(4) As soon as the count of the counter of timer A1 becomes “0000
• Timer mode of timer A
• One-shot timer mode of timer A
Both timer A0 and timer A1 use f
counter of timer A0 performs a down count on count source f
and continues counting. At this time, the timer A0 interrupt request bit goes to “1”.
the counter of timer A1 begins counting, the output level of the TA1
pin goes to “L”, and the counter reloads the content of the reload register and stops counting.
At the same time, the timer A1 interrupt request bit goes to “1”.
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1
IN
for the count source.
.
1
16
.
”, the output level of TA1
OUT
pin goes to “H”.
3. Timer A Applications
OUT