SAM7S256_14 Datasheet, PDF (409/775 Pages) ATMEL Corporation – ARM-based Flash MCU

32. Synchronous Serial Controller (SSC)
32.1
Description
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
32.2 Block Diagram
Figure 32-1. Block Diagram
System
Bus
APB Bridge
Peripheral
Bus
PDC
PMC ^MCK
SSC Interface
Interrupt Control
SSC Interrupt
TF
TK
TD
PIO
RF
RK
RD
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
409