Rev. 1.00, 09/03, page 338 of 704
TCNT_2
clock
TCNT_2
H'FFFF
H'0000
H'0001
TIOCA1,
TIOCA2
TGRA_1
H'03A2
TGRA_2
H'0000
TCNT_1
clock
TCNT_1
H'03A1
H'03A2
Figure 12.22 Example of Cascaded Operation (1)
Figure 12.23 illustrates the operation when counting upon TCNT_2 overflow/underflow has been
set for TCNT_1, and phase counting mode has been designated for channel 2.
TCNT_1 is incremented by TCNT_2 overflow and decremented by TCNT_2 underflow.
TCLKC
TCNT_2
FFFD
TCNT_1
0001
TCLKD
FFFE
FFFF
0000
0001
0002
0001
0000
FFFF
0000
0000
Figure 12.23 Example of Cascaded Operation (2)
12.5.5 PWM
Modes
In PWM mode, PWM waveforms are output from the output pins. 0, 1, or toggle output can be
selected as the output level in response to compare match of each TGR.
Settings of TGR registers can output a PWM waveform in the range of 0% to 100% duty.
Designating TGR compare match as the counter clearing source enables the period to be set in that
register. All channels can be designated for PWM mode independently. Synchronous operation is
also possible.
There are two PWM modes, as described below.
Summary of Contents for H8S/2437
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