Datasheet

Section 15 Serial Communication Interface (SCI, IrDA)
R01UH0309EJ0500 Rev. 5.00 Page 881 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Bit Bit Name Initial Value R/W Description
2 TEND 1 R Transmit End
This bit is set to 1 when no error signal has been
sent back from the receiving end and the next
transmit data is ready to be transferred to TDR.
[Setting conditions]
• When the TE bit in SCR is 0 and the ERS bit is
also 0
• If the ERS bit is 0 and the TDRE bit is 1 after
the specified interval after transmission of 1-
byte data
Timing to set this bit differs according to the
register settings.
GM = 0, BLK = 0: 12.5 etu after transmission
GM = 0, BLK = 1: 11.5 etu after transmission
GM = 1, BLK = 0: 11.0 etu after transmission
GM = 1, BLK = 1: 11.0 etu after transmission
[Clearing conditions]
• When 0 is written to TEND after reading TEND
= 1
• When the DMAC or DTC is activated by a TXI
interrupt and writes data to TDR
1 MPB 0 R Multiprocessor Bit
This bit is not used in Smart Card interface mode.
0 MPBT 0 R/W Multiprocessor Bit Transfer
Write 0 to this bit in Smart Card interface mode.
Note: * Only 0 can be written, to clear the flag.