Datasheet

337
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
31. Synchronous Serial Controller (SSC)
31.1 Overview
The Atmel Synchronous Serial Controller (SSC) provides a synchronous communication link with external devices. It
supports many serial synchronous communication protocols generally used in audio and telecom applications such as
I2S, Short Frame Sync, Long Frame Sync, etc.
The SSC contains an independent receiver and transmitter and a common clock divider. The receiver and the transmitter
each interface with three signals: the TD/RD signal for data, the TK/RK signal for the clock and the TF/RF signal for the
Frame Sync. The transfers can be programmed to start automatically or on different events detected on the Frame Sync
signal.
The SSC’s high-level of programmability and its two dedicated PDC channels of up to 32 bits permit a continuous high bit
rate data transfer without processor intervention.
Featuring connection to two PDC channels, the SSC permits interfacing with low processor overhead to the following:
 CODEC’s in master or slave mode
 DAC through dedicated serial interface, particularly I2S
 Magnetic card reader
31.2 Block Diagram
Figure 31-1. Block Diagram
SSC Interface
PIO
PDC
APB Bridge
MCK
ASB
APB
TF
TK
TD
RF
RK
RD
Interrupt Control
SSC Interrupt
PMC