HD6432138SW datasheet(384/1061 Pages) RENESAS

Part #	HD6432138SW

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1061 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 12 8-Bit Timers

Rev. 4.00 Jun 06, 2006 page 330 of 1004

REJ09B0301-0400

12.3.6

Input Capture Operation

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.

TCNTX

N + 1

n + 1

TICRR

TICRF

TMRIX

Input capture

signal

Figure 12.9 Timing of Input Capture Operation

If the input capture signal enters while TICRR and TICRF are being read, it is internally delayed

one system clock (

φ) period. Figure 12.10 shows the timing of this operation.

HD6432138SW Datasheet(PDF) 384 Page - Renesas Technology Corp