Renesas H8S/2100 Series, Hardware Manual

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Section 12 16-Bit Duty Period Measurement Timer (TDP)
Rev. 1.00 Apr. 28, 2008 Page 344 of 994
REJ09B0452-0100
(2) Input Capture
The value in TDPCNT is transferred to TDPICR by detecting the input edge of the TDPCYI pin in
timer mode. At the same time, the ICPF flag in TDPCSR is set. Detection of rising or falling edges
is selectable by setting the IEDG bit in TDPCR1. Figure 12.4 shows an example of the timing of
input capture operations, and figure 12.5 shows an example of buffer operation for input capture.
φ
TDPCYI
Input capture
signal
ICPF
TDPCNT
N + 3 N + 2 N + 1 N N - 1
TDPICR
M N
Figure 12.4 Example of Input Capture Operation Timing (Selection of Rising Edges)
φ
TDPCYI
Input capture
signal
TDPICRF
TDPCNT
0 + 1 0 N N - 1
0 N M
N M L
TDPICR
Figure 12.5 Example of Buffer Operation for Input Capture