h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 384

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 12 8-Bit Timers
12.3.6
TMRX has input capture registers of TICR,TICRR, and TICRF. Narrow pulse width can be
measured with TICRR and TICRF, using one capture operation controlled by the ICST bit in the
TCONRI register of the timer connection. When TMRIX detects a rising and falling edge
successively after the ICST bit has been set to 1, the values of TCNT at that time are transferred to
TICRR and TICRF and ICST bit is cleared to 0.
The TMRIX input signal can be selected by setting other bits in the TCONRI register.
(1) Input capture input timing
Figure 12.9 shows the timing of the input capture operation.
If the input capture signal enters while TICRR and TICRF are being read, it is internally delayed
one system clock ( ) period. Figure 12.10 shows the timing of this operation.
Rev. 4.00 Jun 06, 2006 page 330 of 1004
REJ09B0301-0400
Input capture
signal
TCNTX
TICRR
TICRF
TMRIX
Input Capture Operation
Figure 12.9 Timing of Input Capture Operation
M
m
n
n
n + 1
n
m
N
N
N + 1