Bit 2—Transmit End (TEND): Indicates that there is no valid data in SCTDR1 when the last bit
of the transmit character is sent, and transmission has been ended.
The TEND flag is read-only and cannot be modified.
Bit 2: TEND
Description
0
Transmission is in progress
[Clearing conditions]
•
•
When 0 is written to TDRE after reading TDRE = 1
When data is written to SCTDR1 by the DMAC
1
Transmission has been ended
[Setting conditions]
(Initial value)
•
•
•
Power-on reset, manual reset, standby mode, or module standby
When the TE bit in SCSCR1 is 0
When TDRE = 1 on transmission of the last bit of a 1-byte serial transmit
character
Bit 1—Multiprocessor Bit (MPB)*: This bit is read-only and cannot be written to. The read
value is undefined.
Note: * This bit is prepared for storing a multi-processor bit in the received data when the receipt
is carried out with a multi-processor format in asynchronous mode. This bit does not
function correctly in this LSI. However, do not use the read value from this bit.
Bit 0—Multiprocessor Bit Transfer (MPBT): When transmission is performed using a
multiprocessor format in asynchronous mode, MPBT stores the multiprocessor bit to be added to
the transmit data.
The MPBT bit setting is invalid in synchronous mode, when a multiprocessor format is not used,
and when the operation is not transmission.
Unlike transmit data, the MPBT bit is not double-buffered, so it is necessary to check whether
transmission has been completed before changing its value.
Bit 0: MPBT
Description
0
1
Data with a 0 multiprocessor bit is transmitted
Data with a 1 multiprocessor bit is transmitted
(Initial value)
Rev. 6.0, 07/02, page 608 of 986
RENESAS [ RENESAS TECHNOLOGY CORP ]
