SH7261 datasheet(803/1348 Pages) RENESAS

803 / 1348 page

Section 18 Serial Sound Interface (SSI)

Rev. 2.00 Sep. 07, 2007 Page 771 of 1312

REJ09B0320-0200

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

SSI0

SSIDATA0

SSIWS1

SSISCK1

SSI1

SSIDATA1

AUDIO_X1

AUDIO_X2

AUDIO_CLK

Figure 18.1 Schematic Diagram of SSI Module

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