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APPENDIX B LIST OF CAUTIONS
User’s Manual U18432EJ5V0UD
915
(3/35)
Chapter
Cl
assi
fi
cati
on
Function
Details of
Function
Cautions
Page
P16/TI01/TO01/
INTP5/EX30,
P17/TI02/TO02/
EX31
To use P16/TI01/TO01/INTP5/EX30 or P17/TI02/TO02/EX31 as a general-purpose
port, set bits 1 and 2 (TO01, TO02) of timer output register 0 (TO0) and bits 1 and 2
(TOE01, TOE02) of timer output enable register 0 (TOE0) to “0”, which is the same
as their default status setting.
p.117
P15/RTCDIV/
RTCCL/EX29
To use P15/RTCDIV/RTCCL/EX29 as a general-purpose port, set bit 4 (RCLOE0) of
real-time counter control register 0 (RTCC0) and bit 6 (RCLOE2) of real-time counter
control register 2 (RTCC2) to “0”, which is the same as their default status settings.
p.117
Soft
Port 1
Do not enable outputting other alternate functions when the external expansion
output (address bus) function is used.
p.117
Hard
Port 2
See 2.2.17 AVREF0 for the voltage to be applied to the AVREF0 pin when using port 2 as
a digital I/O.
p.123
P31/TI03/TO03/
INTP4
To use P31/TI03/TO03/INTP4 as a general-purpose port, set bit 3 (TO03) of timer
output register 0 (TO0) and bit 3 (TOE03) of timer output enable register 0 (TOE0) to
“0”, which is the same as their default status setting.
p.125
P30/RTC1HZ/
INTP3
To use P30/RTC1HZ/INTP3 as a general-purpose port, set bit 5 (RCLOE1) of real-
time counter control register 0 (RTCC0) to “0”, which is the same as its default status
setting.
p.125
P40/TOOL0,
P41/TOOL1
When a tool is connected, the P40 pin cannot be used as a port pin.
When the on-chip debug function is used, P41 pin can be used as follows by the
mode setting on the debugger.
1-line mode: can be used as a port (P41).
2-line mode: used as a TOOL1 pin and cannot be used as a port (P41).
p.128
P43/SCK01,
P44/SI01,
P45/SO01
To use P43/SCK01, P44/SI01, or P45/SO01 as a general-purpose port, note the
serial array unit 0 setting.
For details, refer to Table 13-6 Relationship Between
Register Settings and Pins (Channel 1 of Unit 0: CSI01, UART0 reception).
p.128
P42/TI04/TO04,
P46/INTP1/TI05/
TO05
To use P42/TI04/TO04 or P46/INTP1/TI05/TO05 as a general-purpose port, set bits 4
and 5 (TO04, TO05) of timer output register 0 (TO0) and bits 4 and 5 (TOE04,
TOE05) of timer output enable register 0 (TOE0) to “0”, which is the same as their
default status setting.
p.128
P60/SCL0,
P61/SDA0
Stop the operation of serial interface IIC0 when using P60/SCL0 and P61/SDA0 as
generalpurpose ports.
p.139
Soft
P95/SCK11/SCL
11,
P96/SI11/SDA11
, P97/SO11
To use P95/SCK11/SCL11, P96/SI11/SDA11, or P97/SO11 as a general-purpose
port, note the serial array unit setting. For details, refer to Table 13-8 Relationship
Between Register Settings and Pins (Channel 3 of Unit 0: CSI11, UART1 Reception,
IIC11).
p.144
Hard
P110, P111
See 2.2.18 AVREF1 for the voltage to be applied to the AVREF1 pin when using P110
and P111 as digital I/O.
p.148
P121 to P124
The function setting on P121 to P124 is available only once after the reset release.
The port once set for connection to an oscillator cannot be used as an input port
unless the reset is performed.
p.150
P125/SCK21/SC
L21,
P126/SI21/SDA2
1, or P127/SO21
To use P125/SCK21/SCL21, P126/SI21/SDA21, or P127/SO21 as a general-purpose
port, note the serial array unit 1 setting. For details, refer to Table 13-10 Relationship
Between Register Settings and Pins (Channel 1 of Unit 1: CSI21, UART2 reception,
IIC21).
p.150
Chapter
4
Soft
Port
functions
P131/TI06/TO06 To use P131/TI06/TO06 as a general-purpose port, set bit 6 (TO06) of timer output
register 0 (TO0) and bit 6 (TOE06) of timer output enable register 0 (TOE0) to “0”,
which is the same as their default status setting.
p.155