Renesas H8S/2158 User Manual page 455

Bit Bit Name
1 MPB
0 MPBT
Note: * Only 0 can be written, to clear the flag.
Bit Functions in Smart Card Interface Mode (When SMIF in SCMR = 1)
Bit Bit Name Initial Value
7 TDRE 1
Section 16 Serial Communication Interface (SCI, IrDA, and CRC)
Initial Value R/W
0 R
0 R/W
R/W
R/(W) * Transmit Data Register Empty
Description
Multiprocessor Bit
MPB stores the multiprocessor bit in the receive
frame. When the RE bit in SCR is cleared to 0 its
previous state is retained.
Multiprocessor Bit Transfer
MPBT stores the multiprocessor bit to be added to
the transmit frame.
Description
Indicates whether TDR contains transmit data.
[Setting conditions]
•
When the TE bit in SCR is 0
•
When data is transferred from TDR to TSR, and
TDR can be written to.
[Clearing conditions]
•
When 0 is written to TDRE after reading TDRE = 1
•
When a TXI interrupt request is issued allowing
DTC to write data to TDR
•
When BLK in SMR is 0, and RFU is activated by
TEND = 1 allowing data to be written to TDR (only
for SCI_0 and SCI_2)
•
When BLK in SMR is 1 and RFU is activated by
TDRE = 1 allowing data to be written to TDR (only
for SCI_0 and SCI_2)
Rev. 3.00 Jan 25, 2006 page 401 of 872
REJ09B0286-0300