Section 29 Serial I/O with FIFO (SIOF)
Rev. 1.00 Oct. 01, 2007 Page 1228 of 1956
REJ09B0256-0100
Table 29.11 Conditions to Issue Transmit Request
TFWM[2:0]
Number of
Requested Stages
Transmit Request
Used Areas
000
1
Empty area is 16 stages
100
4
Empty area is 12 stages or more
101
8
Empty area is 8 stages or more
110
12
Empty area is 4 stages or more
Smallest
111
16
Empty area is 1 stage or more
Largest
Table 29.12 Conditions to Issue Receive Request
RFWM[2:0]
Number of
Requested Stages
Receive Request
Used Areas
000
1
Valid data is 1 stage or more
100
4
Valid data is 4 stages or more
101
8
Valid data is 8 stages or more
110
12
Valid data is 12 stages or more
Smallest
111
16
Valid data is 16 stages
Largest
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.
(3) 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 SH7763
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Страница 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Страница 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
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Страница 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Страница 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Страница 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Страница 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Страница 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Страница 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Страница 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Страница 1060: ...Section 23 Gigabit Ethernet Controller GETHER Rev 1 00 Oct 01 2007 Page 994 of 1956 REJ09B0256 0100 ...
Страница 1062: ...Section 24 IP Security Accelerator SECURITY Rev 1 00 Oct 01 2007 Page 996 of 1956 REJ09B0256 0100 ...
Страница 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Страница 1184: ...Section 27 Serial Communication Interface with FIFO SCIF Rev 1 00 Oct 01 2007 Page 1118 of 1956 REJ09B0256 0100 ...
Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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