H8S2110B Datasheet, PDF (237/559 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series

Section 10 8-Bit Timer (TMR)
10.7.3 Input Capture Operation
TMR_X has input capture registers (TICRR and TICRF). A narrow pulse width can be measured
with TICRR and TICRF, using a single capture. If the falling edge of TMRIX (TMR_X input
capture input signal) is detected after its rising edge has been detected, the value of TCNT_X at
that time is transferred to both TICRR and TICRF.
Input Capture Signal Input Timing: Figure 10.11 shows the timing of the input capture
operation.
φ
TMRIX
Input capture
signal
TCNT_X
n
n+1
N
N+1
TICRR
M
n
n
TICRF
m
m
N
Figure 10.11 Timing of Input Capture Operation
If the input capture signal is input while TICRR and TICRF are being read, the input capture
signal is delayed by one system clock (φ) cycle. Figure 10.12 shows the timing of this operation.
Rev. 2.00 Mar 21, 2006 page 199 of 518
REJ09B0299-0200