AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 553

• Manufacturer Part Number: AT91SAM9261-CJ-999
• Description: IC MCU ARM9 ULTRA LP 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9261-CJ-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 190MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 192K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 217-LFBGA
• For Use With: AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

35.8
6062M–ATARM–23-Mar-09
SD Card Operations
The MultiMedia Card Interface allows processing of SD Memory (Secure Digital Memory Card)
Card commands.
SD cards are based on the Multi Media Card (MMC) format, but are physically slightly thicker
and feature higher data transfer rates, a lock switch on the side to prevent accidental overwriting
and security features. The physical form factor, pin assignment and data transfer protocol are
forward-compatible with the MultiMedia Card with some additions.SD is covered by numerous
patents and trademarks, and licensing is only available through the Secure Digital Card
Association.
The SD Card communication is based on a 9-pin interface (Clock, Command, 4 x Data and 3 x
Power lines). The communication protocol is defined as a part of this specification. The main dif-
ference between the SD Card and the MultiMedia Card is the initialization process.
The SD Card Register (MCI_SDCR) allows selection of the Card Slot and the data bus width.
The SD Card bus allows dynamic configuration of the number of data lines. After power up, by
default, the SD Card uses only DAT0 for data transfer. After initialization, the host can change
the bus width (number of active data lines).
AT91SAM9261 Preliminary
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