Version 1.0 10-1
Chapter 10
I
2
S Converter
The Synchronous Serial Port (SSP) to I
2
S converter is an interface that converts a syn-
chronous serial communication stream in TI DSP-compatible mode into an I
2
S compliant
synchronous serial stream. The I
2
S converter operates on serial data in both master and
slave mode.
•The I
2
S converter provides:
– Programmable Word Select (WS) delay
– Left/right channel information:
– Current WS value at the pin
– WS value associated with next entry written to TX FIFO
– WS value associated with next entry read from RX FIFO
– Ability to invert WS state
– Ability to invert the bit clock
• Supports frame size of 16 bits only. Any other frame size will result in a frame size error.
Each frame transmits starting with the most-significant bit.
• Master and Slave modes supported
• A single combined interrupt is generated as an OR function of the individual interrupt
requests.
• Additional interrupts:
– Transmit FIFO underrun
– SSP Protocol error
– External CODEC Protocol error
• Passes SSP data unaltered when module is not enabled.
• Loopback Test Mode support.
Figure 10-1 shows a block diagram of the I
2
S Converter.
To Next Page
Loading...