Table of Contents
Advertisement
Bit 2—Transmit End (TEND): The function of this bit differs for the normal serial
communication interface and for the smart card interface. Its function is switched with the SMIF
bit in SCMR.
For serial communication interface (SMIF bit in SCMR cleared to 0): Indicates that when the
last bit of a serial character was transmitted TDR did not contain valid transmit data, so
transmission has ended. The TEND flag is a read-only bit and cannot be written.
Bit 2
TEND
Description
0
Transmission is in progress
Clearing conditions
Read TDRE when TDRE = 1, then write 0 in TDRE
The DMAC writes data in TDR
1
End of transmission
Setting conditions
The chip is reset or enters standby mode
The TE bit in SCR is cleared to 0
TDRE is 1 when the last bit of a 1-byte serial transmit character is transmitted
For smart card interface (SMIF bit in SCMR set to 1): Indicates that when the last bit of a
serial character was transmitted TDR did not contain valid transmit data, so transmission has
ended. The TEND flag is a read-only bit and cannot be written.
Bit 2
TEND
Description
0
Transmission is in progress
Clearing conditions
Read TDRE when TDRE = 1, then write 0 in TDRE
The DMAC writes data in TDR
1
End of transmission
Setting conditions
The chip is reset or enters standby mode
The TE bit is cleared to 0 in SCR and the FER/ERS bit is also cleared to 0
TDRE is 1 and FER/ERS is 0 (normal transmission) 2.5 etu (when GM = 0) or
1.0 etu (when GM = 1) after a 1-byte serial character is transmitted
Note: etu: Elementary time unit (time required to transmit one bit)
Section 13 Serial Communication Interface
Rev. 4.00 Jan 26, 2006 page 497 of 938
(Initial value)
(Initial value)
REJ09B0276-0400
Advertisement
Table of Contents
