HD6473887 Datasheet, PDF(195/523 Page) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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HD6473887 Datasheet, PDF (195/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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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

1

Functions as TXD31 output pin*

Note: * Set the TE bit in SCR3 after setting this bit to 1.

(initial value)

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

1

Functions as TXD32 output pin*

Note: * Set the TE bit in SCR3 after setting this bit to 1.

(initial value)

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

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