SH7261 Datasheet, PDF (803/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 18 Serial Sound Interface (SSI)
Section 18 Serial Sound Interface (SSI)
The serial sound interface (hereinafter referred to as the "SSI") is a transceiver module designed to
send or receive audio data interface with a variety of devices offering Philips format. It also
provides additional modes for other common formats as well as multi-channel mode.
18.1 Features
• Number of channels: Two 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
• 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 but interface.
• It is possible to control data transmission or reception with DMAC and interrupt requests.
• Selects the oversample clock from among the pins AUDIO_CLK, or AUDIO_X1 and
AUDIO_X2.
 External clock frequency input through the pins AUDIO_CLK, or AUDIO_X1 and
AUDIO_X2: 1 to 40 MHz
 Crystal oscillator frequency for the pins AUDIO_X1 and AUDIO_X2: 10 to 25 MHz
Figure 18.1 shows a schematic diagram of the four channels in the SSI module.
SSIWS0
SSISCK0
SSIDATA0
SSIWS1
SSISCK1
SSIDATA1
SSI0
SSI1
AUDIO_CLK
AUDIO_X1
AUDIO_X2
Figure 18.1 Schematic Diagram of SSI Module
Rev. 2.00 Sep. 07, 2007 Page 771 of 1312
REJ09B0320-0200