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

No. de pieza H8/3021
Descripción Electrónicos  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Fabricante Electrónico  RENESAS [Renesas Technology Corp]
Página de inicio  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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

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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.
1
2
1.
2.
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)



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