D12320VF25IV Datasheet, PDF (605/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 12 8-Bit Timers
12.5 Sample Application
In the example below, the 8-bit timer is used to generate a pulse output with a selected duty cycle,
as shown in figure 12.9. The control bits are set as follows:
[1] In TCR, bit CCLR1 is cleared to 0 and bit CCLR0 is set to 1 so that the timer counter is
cleared when its value matches the constant in TCORA.
[2] In TCSR, bits OS3 to OS0 are set to B'0110, causing the output to change to 1 at a TCORA
compare match and to 0 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.
H'FF
TCORA
TCORB
H'00
TCNT
Counter clear
TMO
Figure 12.9 Example of Pulse Output
Rev.6.00 Sep. 27, 2007 Page 573 of 1268
REJ09B0220-0600