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Section 18 Serial Sound Interface
R01UH0134EJ0400 Rev. 4.00 Page 893 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Section 18 Serial Sound Interface
The serial sound interface is a module designed to send or receive audio data interface with
various devices offering I
2
S bus compatibility. It also provides additional modes for other common
formats, as well as support for multi-channel mode.
18.1 Features
Number of channels: Four channels
Operating mode: Non-compressed mode
The non-compressed mode supports serial audio streams divided by channels.
Serves as both a transmitter and a receiver
Channel 0 supports full-duplex communications.
Capable of using serial bus format
Asynchronous transfer takes place between the data buffer and the shift register.
It is possible to select a value as the dividing ratio for the clock used by the serial bus interface.
It is possible to control data transmission or reception with DMA transfer and interrupt
requests.
Selects the oversampling clock input from among the following pins:
AUDIO_CLK (1 to 25 MHz)
AUDIO_X1, AUDIO_X2 (when connecting a crystal resonator: 10 to 25 MHz, when used to
input external clock: 1 to 25 MHz)
Includes 8-stage FIFO buffers in transmitter and receiver