Section 22 Serial I/O with FIFO (SIOF)
Rev.1.00 Dec. 13, 2005 Page 837 of 1286
REJ09B0158-0100
The number of stages of the FIFO is always sixteen even if the data area or empty area exceeds the
FIFO size (the number of FIFOs). Accordingly, an overflow error or underflow error occurs if data
area or empty area exceeds sixteen FIFO stages. The FIFO transmit or receive request is canceled
when the above condition is not satisfied even if the FIFO is not empty or full.
Number of FIFOs: The number of FIFO stages used in transmission and reception is indicated by
the following register.
•
Transmit FIFO: The number of empty FIFO stages is indicated by the bits TFUA[4:0] in
SIFCTR.
•
Receive FIFO: The number of valid data stages is indicated by the bits RFUA[4:0] in SIFCTR.
The above indicate possible data numbers that can be transferred by the CPU or DMAC.
Содержание SH7780 Series
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Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
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Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
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Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
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Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
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Страница 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
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