Bit 4: P35/TXD31 pin function switch (SPC31)
This bit selects whether pin P35/TXD31 is used as P35 or as TXD31.
Bit 4
SPC31
Description
0
Functions as P35 I/O pin
(initial value)
1
Functions as TXD31 output pin*
Set the TE bit in SCR3 after setting this bit to 1.
Note:
*
Bit 5: P42/TXD32 pin function switch (SPC32)
This bit selects whether pin P42/TXD32 is used as P42 or as TXD32.
Bit 5
SPC32
Description
0
Functions as P42 I/O pin
(initial value)
1
Functions as TXD32 output pin*
Set the TE bit in SCR3 after setting this bit to 1.
Note:
*
Bits 7 and 6: Reserved bits
Bits 7 and 6 are reserved; they are always read as 1 and cannot be modified.
8.14.3
Note on Modification of Serial Port Control Register
When a serial port control register is modified, the data being input or output up to that point is
inverted immediately after the modification, and an invalid data change is input or output. When
modifying a serial port control register, do so in a state in which data changes are invalidated
178
ETC [ ETC ]
