AT91SAM9261SB-CU-999 Atmel, AT91SAM9261SB-CU-999 Datasheet - Page 671

• Manufacturer Part Number: AT91SAM9261SB-CU-999
• Description: IC MCU ARM9 ULTRA LP 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9261SB-CU-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: 48K 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
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: 2-Wire, I2S, SPI, USB
• Maximum Clock Frequency: 190 MHz
• Number Of Programmable I/os: 96
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM9261-EK
• Minimum Operating Temperature: - 40 C
• 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: -
• Lead Free Status / Rohs Status: Details

42.2.6
42.2.6.1
42.2.6.2
42.2.6.3
42.2.6.4
42.2.6.5
42.2.7
42.2.7.1
6242E–ATARM–11-Sep09
MCI
NTRST
MCI: Busy Signal of R1b Responses is not Taken In Account
MCI: Data Timeout Error Flag
MCI: Data Write Operation and Number of Bytes
NTRST: Device Does Not Boot Correctly due to Power-up Sequencing Issue
MCI: STREAM Command Not Supported
MCI: STOP During a WRITE_MULTIPLE_BLOCK Command
The busy status of the card during the response (R1b) is ignored for the commands CMD7,
CMD28, CMD29, CMD38, CMD42, CMD56. Additionally, for commands CMD42 and CMD56 a
conflict can occur on data line 0 if the MCI sends data to the card while the card is still busy.
The behavior is correct for CMD12 command (STOP_TRANSFER).
None
As the data timeout error flag cannot rise, the MCI is stalled indefinitely waiting for the data start
bit.
A STOP command must be sent with a software timeout.
The STREAM READ/WRITE commands are not supported by the MCI.
None.
The WRITE_MULTIPLE_BLOCK with a transfer size (PDC) not a multiple of the block length is
not stopped by the STOP command.
Choose an appropriate size for the block length.
The Data Write operation with a number of bytes less than 12 is impossible.
The PDC counters must always be equal to 12 bytes for data transfers lower than 12 bytes. The
BLKLEN or BCNT field are used to specify the real count number.
The NTRST signal is powered by VDDIOP power supply (3.3V) and the ARM processor is pow-
ered by VDDCORE power supply (1.2V).
During the power-up sequence, if VDDIOP power supply is not established whereas the
VDDCORE Power On Reset output is released, the NTRST signal is not correctly asserted. The
ARM processor then enters debug state and the device does not boot correctly.
1. Connect NTRST pin to NRST pin to ensure that a correct powering sequence takes
2. Connect NTRST to GND if no debug capabilities are required.
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
place in all cases.
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