Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
32
Bit name
Function
bit1 RXE:
Reception enable bit
This bit enables/disables the reception of UART.
⋅
If this bit is set to "0", reception is disabled.
⋅
If this bit is set to "1", reception is enabled.
Notes:
⋅
Even when you enable reception (RXE=1), UART does not start the
reception until a falling edge of the start bit (in the case of NRZ format
(ESCR:INV=0)) is input. (In the case of inverted NRZ format
(ESCR:INV=1), UART does not start the reception until a rising edge is
input.)
⋅
If you disable reception (RXE=0) while a reception is in progress, it
immediately stops the reception.
bit0 TXE:
Transmission enable bit
This bit enables/disables the transmission of UART.
⋅
If this bit is set to "0", transmission is disabled.
⋅
If this bit is set to "1", transmission is enabled.
Note:
⋅
If you disable transmission (TXE=0) while a transmission is in progress,
it immediately stops the transmission.
MB91520 Series
MN705-00010-1v0-E
1345