Datasheet

Section 14 Timer Z
Rev. 3.00 Mar. 15, 2006 Page 270 of 526
REJ09B0060-0300
6. Examples of Buffer Operation
Figure 14.38 shows an operation example in which GRA has been designated as an output
compare register, and buffer operation has been designated for GRA and GRC.
This is an example of TCNT operating as a periodic counter cleared by compare match B.
Pins FTIOA and FTIOB are set for toggle output by compare match A and B.
As buffer operation has been set, when compare match A occurs, the FTIOA pin performs
toggle outputs and the value in buffer register is simultaneously transferred to the general
register. This operation is repeated each time that compare match A occurs.
The timing to transfer data is shown in figure 14.39.
GRB
TCNT value
Counter is cleared by GBR compare match
Time
Compare match A
H'0250
H'0200
H'0100
H'0000
FTIOB
FTIOA
H'0200
H'0250
H'0200
H'0200
H'0100
H'0200
GRC
H'0100
GRA
Figure 14.38 Example of Buffer Operation (1)
(Buffer Operation for Output Compare Register)