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H8S2245 データシート(PDF) 325 Page - Renesas Technology Corp

部品番号 H8S2245
部品情報  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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メーカー  RENESAS [Renesas Technology Corp]
ホームページ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S2245 データシート(HTML) 325 Page - Renesas Technology Corp

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Section 8 I/O Ports
Rev.3.00 Mar. 26, 2007 Page 283 of 772
REJ09B0355-0300
8.14
Handling of Unused Pins
Unused input pins should be fixed high or low. Generally, the input pins of CMOS products are
high-impedance. Leaving unused pins open can cause the generation of intermediate levels due to
peripheral noise induction. This can result in shoot-through current inside the device and cause it
to malfunction. Table 8.25 lists examples of ways to handle unused pins.
Table 8.25
Examples of Ways to Handle Unused Input Pins
Port Name
Pin Handling Example
Port 1
Connect each pin to Vcc (pull-up) or to Vss (pull-down) via a resistor.
Port 2
Port 3
Port 4
Connect each pin to AVcc (pull-up) or to AVss (pull-down) via a resistor.
Port 5
Connect each pin to Vcc (pull-up) or to Vss (pull-down) via a resistor.
Port A
Port B
Port C
Port D
Port E
Port F
Port G



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