r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 254

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
14.6
Figure 14.13
Table 14.7
Notes:
Ports P0, P1, P2, P3,
P4_3 to P4_7, P5_0 to P5_4,
P5_6, P5_7, P6, P8_0 to P8_6
Port P4_2/VREF
RESET
Table 14.7 lists the Handling of Unassigned Pins and Figure 14.13 shows the Handling of Unassigned Pins.
1. Connect these unused pins to the MCU using the shortest wire length (2 cm or less) possible.
2. If these ports are set to output mode and left open, they remain in input mode until they are switched to output
3. When the power-on reset is used.
mode by a program. The voltage level of these pins may be unstable and the power current may increase while
the ports remain in input mode. The content of the direction registers may change due to noise or program
runaway caused by noise. The program should periodically reconfigure the content for enhanced reliability.
Handling of Unassigned Pins
(3)
Pin Name
Preliminary document
Specifications in this document are tentative and subject to change.
Handling of Unassigned Pins
Handling of Unassigned Pins
Ports P0, P1, P2,
P3, P4_3 to P4_7,
P5_0 to P5_4, P5_6,
P5_7, P6,
P8_0 to P8_6
Note:
1. When the power-on reset function is used.
For each of these pins either:
• Set the pin to input mode and either connect it to VSS through a resistor (pull-
Or:
• Set each of these pins to output mode and leave it open
Connect to VCC
Connect to VCC through a resistor (pull-up)
down) or connect it to VCC through a resistor (pull-up)
MCU
Port P4_2/VREF
(Output mode)
(Input mode )
(Input mode )
RESET
(1)
Open
Connection
(1)
(1)
(1, 2)
Page 223 of 725
14. I/O Ports