Renesas Stereo System SH7709S ユーザーズマニュアル

Rev. 5.00, 09/03, page 535 of 760

Bit 3—Modem Control Enable (MCE): Enables modem control signals CTS and RTS.

0

Modem signal disabled

*

(Initial value)

1

Modem signal enabled

Note:  

*

  CTS is fixed at active 0 regardless of the input value, and RTS is also fixed at 0.

Bit 2—Transmit FIFO Data Register Reset (TFRST): Disables the transmit data in the transmit
FIFO data register and resets the data to the empty state.

0

Reset operation disabled

*

(Initial value)

1

Reset operation enabled

Note:  

*

  Reset is executed in a reset or in standby mode.

Bit 1—Receive FIFO Data Register Reset (RFRST): Disables the receive data in the receive
FIFO data register and resets the data to the empty state.

0

Reset operation disabled

*

(Initial value)

1

Reset operation enabled

Note:  

*

  Reset is executed in a reset or in standby mode.

Bit 0—Loop-Back Test (LOOP): Internally connects the transmit output pin (TXD) and receive
input pin (RXD) and enables loop-back testing.

0

Loop back test disabled

(Initial value)

1

Loop back test enabled