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Section 21 IEBus
TM
Controller
Page 1128 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
5 RXF 0 R/(W)* Receive Normal Completion
Indicates that data for the number of bytes specified by
the message length bits has been received normally.
[Setting condition]
When data for the number of bytes specified by the
message length bits has been received normally.
[Clearing condition]
When 1 is written
4 RXEDE 0 R/(W)* Broadcast Receive Error
Indicates that data could not be received because the
receive buffer is not in the receive enabled state (when
the RE bit is not set to 1 or the RXBSY flag is set.)
during receiving control field broadcast reception. This
bit functions when the DEE bit in IECTR is set to 1.
[Setting condition]
When data could not be received during broadcast
reception.
[Clearing condition]
When 1 is written
3 RXEOVE 0 R/(W)* Receive Overrun Flag
Used to indicate the overrun during data reception. This
module sets this flag when this module receives the
next byte data while the receive data has not been read
(the RXBSY flag is not cleared). If this case, this
module assumes that an overrun error has occurred
and returns a NAK to the communications destination
unit.
The communications destination unit retransmits data
up to the maximum number of transmit bytes. This
module, however, returns a NAK when the RXBSY flag
remains set.
If the RXBSY flag is cleared to 0, this module returns
an ACK, and receives the next data.
In broadcast reception, if the RXBSY flag is set during
data receive start, this module immediately enters the
wait state. This flag becomes enabled only after the
receive start flag (RXS) is set.
[Setting condition]
When the next byte data is received while the
RXBSY flag is not cleared.
[Clearing condition]
When 1 is written