HD64F2145 datasheet(325/829 Pages) RENESAS

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HD64F2145 Datasheet(PDF) 325 Page - Renesas Technology Corp

Part #	HD64F2145

Description	Hitachi 16-Bit Single-Chip Microcomputer

PDF	829 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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325 / 829 page

Rev. 2.0, 08/02, page 285 of 788

12.5.4

Timing of Counter Clear at Compare-Match

TCNT is cleared when compare-match A or compare-match B occurs, depending on the setting of

the CCLR1 and CCLR0 bits in TCR. Figure 12.8 shows the timing of clearing the counter by a

compare-match.

H'00

Compare-match

signal

TCNT

Figure 12.8 Timing of Counter Clear by Compare-Match

12.5.5

TCNT External Reset Timing

TCNT is cleared at the rising edge of an external reset input, depending on the settings of the

CCLR1 and CCLR0 bits in TCR. The width of the clearing pulse must be at least 1.5 states. Figure

12.9 shows the timing of clearing the counter by an external reset input.

Clear signal

External reset

input pin

TCNT

H'00

N – 1

Figure 12.9 Timing of Counter Clear by External Reset Input

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