AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 409

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

32. Synchronous Serial Controller (SSC)
32.1
32.2
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:
Block Diagram
Figure 32-1. Block Diagram
• CODEC’s in master or slave mode
• DAC through dedicated serial interface, particularly I2S
• Magnetic card reader
Peripheral
System
Bus
Bus
APB Bridge
PMC
MCK
PDC
SSC Interface
Interrupt Control
SSC Interrupt
SAM7S Series [DATASHEET]
PIO
6175M–ATARM–26-Oct-12
TF
TK
TD
RF
RK
RD
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