hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 189

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

Bit 4: P3
This bit selects whether pin P3
Bit 4
SPC31
0
1
Note: * Set the TE bit in SCR3 after setting this bit to 1.
Bit 5: P4
This bit selects whether pin P4
Bit 5
SPC32
0
1
Note: * Set the TE bit in SCR3 after setting this bit to 1.
Bits 7 and 6: Reserved bits
Bits 7 and 6 are reserved; they are always read as 1 and cannot be modified.
8.11.3
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.
174
5
2
Note on Modification of Serial Port Control Register
/TXD
/TXD
Description
Functions as P3
Functions as TXD
Description
Functions as P4
Functions as TXD
31
32
pin function switch (SPC31)
pin function switch (SPC32)
5
2
5
2
/TXD
/TXD
I/O pin
I/O pin
31
32
output pin*
output pin*
31
32
is used as P3
is used as P4
5
2
or as TXD
or as TXD
31
32
.
.
(initial value)
(initial value)