HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 294
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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Section 10 16-Bit Integrated Timer Pulse Unit (ITU)
10.4.4
PWM mode is controlled using both GRA and GRB in pairs. The PWM waveform is output from
the TIOCA output pin. The PWM waveform’s 1 output timing is set in GRA and the 0 output
timing is set in GRB. A PWM waveform with a duty cycle between 0% and 100% can be output
from the TIOCA pin by selecting either compare match GRA or GRB as the counter clear source
for the timer counter. All five channels can be set to PWM mode.
Table 10.11 lists the combinations of PWM output pins and registers. Note that when GRA and
GRB are set to the same value, the output will not change even if a compare match occurs.
Table 10.11 Combinations of PWM Output Pins and Registers
Channel
0
1
2
3
4
Procedure for Selecting PWM Mode (Figure 10.28):
1. Set bits TPSC2–TPSC0 in TCR to select the counter clock source. If an external clock source
2. Set CCLR1 and CCLR0 in TCR to select the counter clear source.
3. Set the time at which the PWM waveform should go to 1 in GRA.
4. Set the time at which the PWM waveform should go to 0 in GRB.
5. Set the PWM bit in TMDR to select PWM mode. When PWM mode is selected, regardless of
6. Set the STR bit in TSTR to start the TCNT count.
Rev. 7.00 Jan 31, 2006 page 268 of 658
REJ09B0272-0700
is selected, set bits CKEG1 and CKEG0 in TCR to select the desired edge of the external clock
signal.
the contents of TIOR, GRA and GRB become output compare registers specifying the times at
which the PWM waveform goes high and low. TIOCA becomes a PWM output pin. TIOCB
functions according to the setting of bits IOB1 and IOB0 in TIOR.
PWM Mode
Output Pin
TIOCA0
TIOCA1
TIOCA2
TIOCA3
TIOCA4
1 Output
GRA0
GRA1
GRA2
GRA3
GRA4
0 Output
GRB0
GRB1
GRB2
GRB3
GRB4
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