Renesas SH7781 - Manual (Page 1145)

22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1115 of 1658
REJ09B0261-0100
Bit Bit Name
Initial
Value R/W Description
5 SAERR 0 R/W Slot Assign Error
0: Indicates that no slot assign error occurs
1: Indicates that a slot assign error occurs
A slot assign error occurs when the settings in SITDAR,
SIRDAR, and SICDAR overlap.
If a slot assign error occurs, the SIOF does not transmit
data to the SIOF_TXD pin and does not receive data
from the SIOF_RXD pin. Note that the SIOF does not
clear the TXE bit or RXE bit in SICTR at a slot assign
error.
• This bit is valid when the TXE bit or RXE bit in
SICTR is 1.
• When 1 is written to this bit, the contents are
cleared. Writing 0 to this bit is invalid.
• To enable the issuance of this interrupt source, set
the SAERRE bit in SIIER to 1.
4 FSERR 0 R/W Frame Synchronization Error
0: Indicates that no frame synchronization error occurs
1: Indicates that a frame synchronization error occurs
A frame synchronization error occurs when the next
frame synchronization timing appears before the
previous data or control data transfers have been
completed.
If a frame synchronization error occurs, the SIOF
performs transmission or reception for slots that can be
transferred.
• This bit is valid when the TXE or RXE bit in SICTR
is 1.
• When 1 is written to this bit, the contents are
cleared. Writing 0 to this bit is invalid.
• To enable the issuance of this interrupt source, set
the FSERRE bit in SIIER to 1.