Renesas ZTAT H8S/2357F, Hardware Manual

Page: 505 / 1047

Rev.6.00 Oct.28.2004 page 477 of 1016
REJ09B0138-0600H
Bit 3—Parity Error (PER): Indicates that a parity error occurred during reception using parity addition in asynchronous
mode, causing abnormal termination.
Bit 3
PER
Description
0 [Clearing condition] (Initial value)
*
1
When 0 is written to PER after reading PER = 1
1 [Setting condition]
When, in reception, the number of 1 bits in the receive data plus the parity bit does not
match the parity setting (even or odd) specified by the O/
E
bit in SMR *
2
Notes: 1. The PER flag is not affected and retains its previous state when the RE bit in SCR is cleared to 0.
2. If a parity error occurs, the receive data is transferred to RDR but the RDRF flag is not set. Also, subsequent
serial reception cannot be continued while the PER flag is set to 1. In clocked synchronous mode, serial
transmission cannot be continued, either.
Bit 2—Transmit End (TEND): Indicates that there is no valid data in TDR 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 [Clearing conditions]
•
When 0 is written to TDRE after reading TDRE = 1
•
When the DMAC or DTC is activated by a TXI interrupt and write data to TDR
1 [Setting conditions] (Initial value)
•
When the TE bit in SCR is 0
•
When TDRE = 1 at transmission of the last bit of a 1-byte serial transmit character
Bit 1—Multiprocessor Bit (MPB): When reception is performed using multiprocessor format in asynchronous mode,
MPB stores the multiprocessor bit in the receive data.
MPB is a read-only bit, and cannot be modified.
Bit 1
MPB
Description
0 [Clearing condition] (Initial value) *
When data with a 0 multiprocessor bit is received
1 [Setting condition]
When data with a 1 multiprocessor bit is received
Note:
*
Retains its previous state when the RE bit in SCR is cleared to 0 with multiprocessor format.