Figure 9.14 Input Capture Buffer Operation; Figure 9.15 Example Of Buffer Operation Setting Procedure - Renesas H8SX/1520 Series Hardware Manual

Section 9 16-Bit Timer Pulse Unit (TPU)
• 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 9.14.
Input capture
signal
Buffer register
(1)
Example of Buffer Operation Setting Procedure
Figure 9.15 shows an example of the buffer operation setting procedure.
Rev. 3.00 Mar. 14, 2006 Page 308 of 804
REJ09B0104-0300
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Figure 9.14 Input Capture Buffer Operation

Buffer operation
Select TGR function [1]
Set buffer operation [2]
Start count [3]
<Buffer operation>

Figure 9.15 Example of Buffer Operation Setting Procedure

Timer general
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.
TCNT