Section 21 Serial Communication Interface with FIFO (SCIF)
Rev.1.00 Dec. 13, 2005 Page 743 of 1286
REJ09B0158-0100
21.3.3
Transmit Shift Register (SCTSR)
SCTSR is the register used to transmit serial data.
To perform serial data transmission, the SCIF first transfers transmit data from SCFTDR to
SCTSR, then sends the data to the SCIF_TXD pin starting with the LSB (bit 0).
When transmission of one byte is completed, the next transmit data is transferred from SCFTDR
to SCTSR, and transmission started, automatically.
SCTSR cannot be directly read from and written to by the CPU.
0
1
2
3
4
5
6
7
Bit:
Initial value:
R/W:
21.3.4
Transmit FIFO Data Register (SCFTDR)
SCFTDR is an 8-bit FIFO register of 64 stages that stores data for serial transmission.
If SCTSR is empty when transmit data has been written to SCFTDR, the SCIF transfers the
transmit data written in SCFTDR to SCTSR and starts serial transmission.
SCFTDR is a write-only register, and cannot be read by the CPU.
The next data cannot be written when SCFTDR is filled with 64 bytes of transmit data. Data
written in this case is ignored.
0
1
2
3
4
5
6
7
—
—
—
—
—
—
—
—
W
W
W
W
W
W
W
W
Bit:
Initial value:
R/W:
Summary of Contents for SH7780 Series
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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 ...
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