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• 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 TGR is transferred to the buffer register.
This operation is illustrated in figure 9.13.
Input capture
signal
Buffer register
(1)
Example of Buffer Operation Setting Procedure
Figure 9.14 shows an example of the buffer operation setting procedure.
Buffer operation
Select TGR function
Set buffer operation
<Buffer operation>
Figure 9.14 Example of Buffer Operation Setting Procedure
Timer general
Figure 9.13 Input Capture Buffer Operation
[1]
[2]
Start count
[3]
Section 9 16-Bit Timer Pulse Unit (TPU)
register
[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
operation.
Rev.2.00 Jun. 28, 2007 Page 355 of 666
TCNT
REJ09B0311-0200
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