Section 26 Serial Sound Interface (SSI) Module
Rev.1.00 Dec. 13, 2005 Page 1018 of 1286
REJ09B0158-0100
When an underflow or overflow error condition is met, the CHNO[1:0] and SWNO bits can be
used to recover the SSI module to a known status. When an underflow or overflow occurs, the
host CPU can read the number of channels and the number of system words to determine what
point the serial audio stream has reached. In the transmitter case, the host CPU can skip forward
through the data it wants to transmit until it finds the sample data that matches what the SSI
module is expecting to transmit next, and so resynchronize with the audio data stream. In the
receiver case, the host CPU can skip forward storing null sample data until it is ready to store the
sample data that the SSI module is indicating that it will receive next to ensure consistency of the
number of received data, and so resynchronize with the audio data stream.
26.4.7 Serial
Clock
Control
This function is used to control and select which clock is used for the serial bus interface.
If the serial clock direction is set to input (SCKD = 0), the SSI module is in clock slave mode, then
the bit clock that is used in the shift register is derived from the SSI_SCK pin.
If the serial clock direction is set to output (SCKD = 1), the SSI Module is in clock master mode,
and the shift register uses the bit clock derived from the HAC_BIT_CLK input pin or its clock
divided. This input clock is then divided by the ratio in the serial oversampling clock division ratio
(CKDV) bit in SSICR and used as the bit clock in the shift register.
In either case, the SSI_SCK pin output is the same as the bit clock.
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 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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