H8SLASH3021 datasheet(259/712 Pages) RENESAS

Part #	H8/3021

Description	16-Bit Single-Chip Microcomputer

PDF	712 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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259 / 712 page

8. 16-Bit Integrated Timer Unit (ITU)

Rev.2.00 Mar. 22, 2007 Page 235 of 684

REJ09B0352-0200

Input selection

Select input-capture input

Start counter

Input capture

Set TIOR to select the input capture function of a

general register and the rising edge, falling edge,

or both edges of the input capture signal. Clear the

port data direction bit to 0 before making these

TIOR settings.

Set the STR bit to 1 in TSTR to start the timer

counter.

Figure 8.23 Setup Procedure for Input Capture (Example)

• Examples of input capture

Figure 8.24 illustrates input capture when the falling edge of TIOCB and both edges of TIOCA

are selected as capture edges. TCNT is cleared by input capture into GRB.

H'0005

H'0180

Time

H'0180

H'0160

H'0005

H'0000

TIOCB

TIOCA

GRA

GRB

Counter cleared by TIOCB

input (falling edge)

TCNT value

H'0160

Figure 8.24 Input Capture (Example)

H8/3021 Datasheet(PDF) 259 Page - Renesas Technology Corp