Sample Application - Renesas H8S Series Hardware Manual

16-bit single-chip microcomputer

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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.

Figure 12-9 Example of Pulse Output

Counter clear

Rev.6.00 Oct.28.2004 page 447 of 1016

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