Section 26 Serial Sound Interface (SSI) Module
Rev.1.00 Dec. 13, 2005 Page 1008 of 1286
REJ09B0158-0100
8. Mute Enabled
As basic sample format configuration except MUEN = 1 (TD data ignored)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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SSI_SCK
SSI_WS
SSI_SDATA
1st Channel
2nd Channel
Figure 26.17 Mute Enabled
26.4.3 Compressed
Modes
The compressed mode is used to transfer a continuous bit stream. This would typically be a
compressed bit stream which requires downstream decoding.
In streaming transfer (burst mode not enabled) there is no concept of a data word. However in
order to receive and transmit it is necessary to transfer between the serial bus and word formatted
memory. Therefore the word boundary selection is arbitrary during receive/transmit and must be
dealt with by another module. When burst mode is enabled then data bits being transmitted can be
identified by virtue of the fact that the serial clock output is only activated when there is a word to
be output and only the required number of clock pulses necessary to clock out each 32-bit word
are generated. The serial bit clock stops at a low level when SSICR.SCKP = 0, and at a high level
when SSICR.SCKP = 1. Note burst mode is only valid in the context of the SSI module being a
transmitter of data. Burst mode data cannot be received by this module.
Data is transmitted and received in blocks of 32 bits, and the first bit received/transmitted bit is bit
31 when stored in memory.
The word select pin in this mode does not act as a system word start signal as in non-compressed
mode, but instead is used to indicate that the receiver can receive another data burst, or the
transmitter can transmit another data burst.
Figures 26.18 and 26.19 show the compressed mode data transfer, with burst mode disabled, and
enabled, respectively.
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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