SH7101 datasheet(200/560 Pages) RENESAS

200 / 560 page

Section 8 Multifunction Timer Pulse Unit (MTU)

Rev.1.00 Sep. 18, 2008 Page 166 of 522

REJ09B0069-0100

• When TGR is an output compare register

When a compare match occurs, the value in the buffer register for the corresponding channel is

transferred to the timer general register.

This operation is illustrated in figure 8.13.

Buffer

Timer general

TCNT

Comparator

Compare match signal

Figure 8.13 Compare Match Buffer Operation

• When TGR is an input capture register

When input capture occurs, the value in TCNT is transferred to TGR and the value previously

held in the timer general register is transferred to the buffer register.

This operation is illustrated in figure 8.14.

Buffer

Timer general

TCNT

Input capture

signal

Figure 8.14 Input Capture Buffer Operation

Example of Buffer Operation Setting Procedure: Figure 8.15 shows an example of the buffer

operation setting procedure.

Buffer operation

Select TGR function

Set buffer operation

Start count

[1]

[2]

[3]

[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 start the count

operation.

Figure 8.15 Example of Buffer Operation Setting Procedure

SH7101 Datasheet(PDF) 200 Page - Renesas Technology Corp