3.12. Digital Audio Ports¶
|83 89||SSI1_INT SSI2_INT||Interrupt|
|84 90||SSI1_RXD SSI2_RXD||Receive serial data|
|85 91||SSI1_TXD SSI2_TXD||Transmit serial data|
|86 92||SSI1_CLK SSI2_CLK||Serial clock|
|87 93||SSI1_FS SSI2_FS||Frame Sync|
|TX28S, TX48||Only one SSI port available, SSI2 pins are not connected.|
|TX28, TX28S||On this module the SSI is a half-duplex serial port.|
The SSI is a full-duplex, serial port that allows the chip to communicate with a variety of serial devices. These serial devices can be standard CODer-DECoder (CODECs), Digital Signal Processors (DSPs), microprocessors, peripherals, and popular industry audio CODECs that implement the inter-IC sound bus standard (I2S) standard.
SSI is typically used to transfer samples in a periodic manner. The SSI consists of independent transmitter and receiver sections with independent clock generation and frame synchronization.
Audio Codec example: