Datasheet

Section 12 8-Bit Timers
Rev. 4.00 Jun 06, 2006 page 334 of 1004
REJ09B0301-0400
12.5 8-Bit Timer Application Example
In the example below, the 8-bit timer is used to generate a pulse output with a selected duty cycle,
as shown in figure 12.12. The control bits are set as follows:
• In TCR, CCLR1 is cleared to 0 and CCLR0 is set to 1 so that the timer counter is cleared by a
TCORA compare-match.
• In TCSR, bits OS3 to OS0 are set to B'0110, causing 1 output at a TCORA compare-match and
0 output at a TCORB compare-match.
With these settings, the 8-bit timer provides output of pulses at a rate determined by TCORA with
a pulse width determined by TCORB. No software intervention is required.
TCNT
H'FF
Counter clear
TCORA
TCORB
H'00
TMO
Figure 12.12 Pulse Output (Example)