AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 695

• 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: -

42.2.3
42.2.3.1
42.2.3.2
42.2.3.3
42.2.3.4
42.2.4
42.2.4.1
42.2.5
42.2.5.1
6062M–ATARM–23-Mar-09
Boot ROM
Bus Matrix
LCD
Boot ROM: NAND Flash Boot is not Functional
Boot ROM: Watchdog Disable
Boot ROM: Temperature Range
Boot ROM: UDP Pad Pull-up Enable
Bus Matrix: Problem with locked transfers261
LCD: Screen shifting after a reset
NAND Flash Boot is not functional in this revision
None.
When AT91SAM9261 boots on internal ROM (BMS =1) the watchdog timer is disabled by soft-
ware. Because the watchdog mode register is a “write once”, the system, designed to boot on an
SPI DataFlash, cannot reuse the watchdog functionality.
If the watchdog feature is mandatory for the application, the system must boot on external mem-
ory connected on CS0 (BMS = 0).
The temperature range for the Boot ROM use is 0°C / 70°C.
Starting up the device outside this temperature range can lead to unpredictable behavior. If the
AT91SAM9261-based system may have to start up at temperatures below 0° C and above
70° C, it is recommended to boot out of an external memory connected on NCS0.
None.
When AT91SAM9261 boots on internal ROM (BMS = 1), the UDP pad pull-up is enabled by soft-
ware. This can lead to an enumeration error.
Disable UDP pad pull-up at the beginning of the boot program (ex: at91bootstrap).
Locked transfers are not correctly handled by the Bus Matrix and can lead to a system freeze
up. This does not concern ARM locked transfers.
Avoid other Bus Matrix masters locked transfers.
When a FIFO underflow occurs, a reset of the LCD DMA and FIFO pointers is necessary.
If only LCD DMA pointers are reset (FIFO pointers not reset), the displayed image is shifted.
Apply the following sequence to correctly reset LCD DMA and FIFO pointers:
• LCD power off
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
AT91SAM9261 Preliminary
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