Hitachi H8/329 Series Hardware Manual page 180

Bit 5—Transmit Enable (TE): This bit enables or disables the transmit function. When the
transmit function is enabled, the TxD pin is automatically used for output. When the transmit
function is disabled, the TxD pin can be used as a general-purpose I/O port.
Bit 5
TE Description
0 The transmit function is disabled.
The TxD pin can be used for general-purpose I/O.
1 The transmit function is enabled. The TxD pin is used for output.
Bit 4—Receive Enable (RE): This bit enables or disables the receive function. When the receive
function is enabled, the RxD pin is automatically used for input. When the receive function is
disabled, the RxD pin is available as a general-purpose I/O port.
Bit 4
RE Description
0 The receive function is disabled. The RxD pin can be
used for general-purpose I/O.
1 The receive function is enabled. The RxD pin is used for input.
171
(Initial value)
(Initial value)