Section 23 Serial Protocol Interface (HSPI)
Rev.1.00 Dec. 13, 2005 Page 856 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W Description
3 RXOW
0 R/W
*
Receive Buffer Overrun Warning Flag
This status flag is set to 1 when a new serial data
transfer starts and the previous received data has not
been read from SPRBR. The RXOW remain set to 1
until writing a 0 to its bit position.
If RXOW= 1 and ROIE = 1 then the interrupt is
generated.
2
RXFL
0
R
Receive Buffer Full Status Flag
This status flag indicates that new data is available in
the SPRBR and has not yet been read. It is set to 1 at
the completion of a serial bus transfer at the point the
shift register contents are loaded into the SPRBR. This
bit is cleared to 0 by reading SPRBR.
If RXFL = 1 and RXDE = 1 then the DMA transfer
request enabled.
1
TXFN
0
R
Transmit Complete Status Flag
This status flag indicates that the last transmission has
completed. It is set to 1 when SPTBR is able to write
more data from the peripheral bus. This bit is cleared to
0 by writing more data SPTBR.
If TXFN = 1 and TFIE = 1 then the interrupt is
generated.
0
TXFL
0
R
Transmit Buffer Full Status Flag
This status flag indicates SPTBR has transmitted data.
It is set to 1 when SPTBR is written with data from the
peripheral bus. This bit is cleared to 0 when SPTBR is
able to accept more data from the peripheral bus.
If TXFL = 0 (i.e. the SPTBR is empty) and TXDE = 1
then the DMA transfer request enabled.
Note:
*
These bits are readable/writable bits. When writing 0, these bits are initialized, while
writing 1 is ignored.
Содержание SH7780 Series
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