Renesas SH7781 - Manual (Page 1173)

22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1143 of 1658
REJ09B0261-0100
(5) Transmit/Receive Reset
The SIOF can separately reset the transmit and receive units by setting the following bits to 1.
• Transmit reset: TXRST bit in SICTR
• Receive reset: RXRST bit in SICTR
Table 22.13 shows the details on initialization upon transmit or receive reset.
Table 22.13 Transmit and Receive Reset
Type Objects to be Initialized
Transmit reset Stop transmitting from SIOF_TXD (output according to the value set in
the TXDIZ bit)
Transmit FIFO write pointer
TCRDY, TFEMP, and TDREQ bits in SISTR
TXE bit in SICTR
Receive reset Stop receiving from SIOF_RXD
Receive FIFO read pointer
RCRDY, RFFUL, and RDREQ bits in SISTR
RXE bit in SICTR