Section 15 Serial I/O with FIFO (SIOF)
Rev. 2.00 Mar 09, 2006 page 648 of 906
REJ09B0292-0200
Bit 0—Receive Data Register Full (RDRF): Flag that indicates that SIRDR receive data is waiting.
Bit 0: RDRF
Description
0
Indicates that the amount of primary receive data in SIRDR is less than the
receive FIFO watermark setting
(Initial value)
RDRF is cleared to 0 in the following cases:
•
When the received primary data in SIRDR has been read to the point that
the amount of remaining data is less than the receive FIFO watermark
setting and 0 is written to RDRF after reading RDRF = 1
•
When the DMAC has read the received primary data in SIRDR to the
point that the amount of remaining data is less than the receive FIFO
watermark setting
•
When the RFRST bit in SIFCR is set to 1
•
When the processor is reset
1
Indicates that the amount of primary receive data in SIRDR is greater than or
equal to the receive FIFO watermark setting
RDRF is set to 1 in the following cases:
•
When the received primary data stored in SIRDR is greater than or equal
to the receive FIFO watermark setting
15.2.7
Receive Control Data Register (SIRCDR)
Bit: 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Initial value:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W:
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
SIRCDR is a register that stores receive control data. Received data is stored in SIRCDR as
receive control data, synchronized with the timing used for transmission of transmit control data
from SITCDR.
The RCD bit in SISTR is set at the same time as control data is being transferred from SIRSR to
SIRCDR. When the RCIE pin in SICTR is set, a receive-control-data-full interrupt request (RDFI)
is sent to the INTC. No interrupt request signal is issued if the flag is cleared.
SIRCDR is initialized to H'0000 by a reset.
If the DL bit is cleared to 0 (data length 8 bits), the received control data is fetched to the lower 8
bits, and the upper 8 bits are cleared to 0.
Содержание SH7616
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Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...