3.12. Digital Audio Ports¶
Pin |
Signal |
Description |
type |
I/O |
|---|---|---|---|---|
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 |
||
Module |
Remark |
|||
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:
