H838532H datasheet(259/508 Pages) RENESAS

부품명	H838532H

상세설명	16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series

PDF	508 Pages

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제조업체	RENESAS [Renesas Technology Corp]

홈페이지	http://www.renesas.com

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259 / 508 page

Section 9 Timers

Rev. 1.00 May 30, 2008 Page 239 of 484

REJ09B0436-0100

(2) TCF Increment Timing

TCF is incremented by clock input (internal clock or external event input).

a. Internal clock operation

Bits CKSH2 to CKSH0 or CKSL2 to CKSL0 in TCRF select one of four internal clock

sources (

φ/32, φ/16, φ/4, or φw/4) created by dividing the system clock (φ or φw).

b. External event operation

External event input is selected by clearing CKSL2 to 0 in TCRF. TCF can increment on either

the rising or falling edge of external event input. External event edge selection is set by IEG3

in the interrupt controller’s IEGR register. An external event pulse width of at least 2 system

clocks (

φ) is necessary. Shorter pulses will not be counted correctly.

(3) TMOFH/TMOFL Output Timing

In TMOFH/TMOFL output, the value set in TOLH/TOLL in TCRF is output. The output is

toggled by the occurrence of a compare match. Figure 9.6 shows the output timing.

TMIF

(when IEG3 = 1)

Count input

clock

TCF

OCRF

TMOFH TMOFL

Compare match

signal

N+1

Figure 9.6 TMOFH/TMOFL Output Timing

H838532H 데이터시트(PDF) 259 Page - Renesas Technology Corp