HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 325

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8.14
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
Port 1
Port 2
Port 3
Port 4
Port 5
Port A
Port B
Port C
Port D
Port E
Port F
Port G
Handling of Unused Pins
Pin Handling Example
Connect each pin to Vcc (pull-up) or to Vss (pull-down) via a resistor.
Connect each pin to AVcc (pull-up) or to AVss (pull-down) via a resistor.
Connect each pin to Vcc (pull-up) or to Vss (pull-down) via a resistor.
Rev.3.00 Mar. 26, 2007 Page 283 of 772
Section 8 I/O Ports
REJ09B0355-0300