Section 22 Serial I/O with FIFO (SIOF)
Rev.1.00 Dec. 13, 2005 Page 814 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W Description
12
TDREQ
0
R
Transmit Data Transfer Request
0: Indicates that the size of empty space in the transmit
FIFO does not exceed the size specified by the
TFWM bit in SIFCTR.
1: Indicates that the size of empty space in the transmit
FIFO exceeds the size specified by the TFWM bit in
SIFCTR.
A transmit data transfer request is issued when the
empty space in the transmit FIFO exceeds the size
specified by the TFWM bit in SIFCTR.
When using transmit data transfer through the DMAC,
this bit is always cleared by one DMAC access. After
DMAC access, when conditions for setting this bit are
satisfied, the SIOF again indicates 1 for this bit.
•
This bit is valid when the TXE bit in SICTR is 1.
•
This bit indicates a state; if the size of empty space
in the transmit FIFO is less than the size specified
by the TFWM bit in SIFCTR, the SIOF clears this
bit.
•
If the issue of interrupts by this bit is enabled, an
SIOF interrupt is issued.
11 —
0 R Reserved
This bit is always read as 0. The write value should
always be 0.
10
RCRDY
0
R
Receive Control Data Ready
0: Indicates that the SIRCR stores no valid data.
1: Indicates that the SIRCR stores valid data.
•
If SIRCR is written when this bit is set to 1, SIRCR
is modified by the latest data.
•
This bit is valid when the RXE bit in SICTR is set to
1.
•
This bit indicates a state of the SIOF. If SIRCR is
read, the SIOF clears this bit.
•
If the issue of interrupts by this bit is enabled, an
SIOF interrupt is issued.
Summary of Contents for SH7780 Series
Page 2: ...Rev 1 00 Dec 13 2005 Page ii of l ...
Page 28: ...Rev 1 00 Dec 13 2005 Page xxviii of l ...
Page 50: ...Rev 1 00 Dec 13 2005 Page l of l ...
Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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Page 1340: ...SH7780 Hardware Manual ...