Renesas H8S Series Hardware Manual page 408

16-bit single-chip microcomputer

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Example of Buffer Operation Setting Procedure: Figure 10-18 shows an example of the buffer operation setting

Buffer operation

Select TGR function

Set buffer operation

Examples of Buffer Operation

• When TGR is an output compare register

Figure 10-19 shows an operation example in which PWM mode 1 has been designated for channel 0, and buffer

operation has been designated for TGRA and TGRC. The settings used in this example are TCNT clearing by compare

match B, 1 output at compare match A, and 0 output at compare match B.

As buffer operation has been set, when compare match A occurs the output changes and the value in buffer register

TGRC is simultaneously transferred to timer general register TGRA. This operation is repeated each time compare

match A occurs.

For details of PWM modes, see section 10.4.6, PWM Modes.

Rev.6.00 Oct.28.2004 page 380 of 1016

REJ09B0138-0600H

Figure 10-18 Example of Buffer Operation Setting Procedure

Figure 10-19 Example of Buffer Operation (1)

[1] Designate TGR as an input capture register or

output compare register by means of TIOR.

[2] Designate TGR for buffer operation with bits

BFA and BFB in TMDR.

[3] Set the CST bit in TSTR to 1 to start the count