SAM9-L9260 Olimex Ltd., SAM9-L9260 Datasheet - Page 22

• Manufacturer Part Number: SAM9-L9260
• Description: MCU, MPU & DSP Development Tools DEV BRD FOR AT91SAM9260
• Manufacturer: Olimex Ltd.

Specifications of SAM9-L9260

• Processor To Be Evaluated: AT91SAM9260
• Data Bus Width: 16 bit, 32 bit
• Interface Type: RS-232, Ethernet, USB, JTAG
• Dimensions: 100 mm x 80 mm
• Operating Supply Voltage: 5 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: ARM9
• Silicon Core Number: AT91S
• Silicon Family Name: AT91SAM9xxx
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 1701512 25R5022

to write a project that runs directly on the core, without the need of an operating system. It
was developed using IAR Embedded Workbench for ARM ver. 4.42A with a Segger J-Link
JTAG adapter
Q: When booting from the internal NAND flash the board seems to hang at "INIT: version
2.86 booting" and/or "Activating swap...done" lines
A: When mounting the JFFS2 root filesystem, the system performs a consystency check
(similar to fsck). This almost blocks all access to the nand flash and the system appears to
hang. Please wait - on a first boot of a new filesystem this could take up to 5 minutes and is
considered normal.
Q: There are messages "Buffer I/O error on device mtdblock0, logical block 0;end_request:
I/O error, dev mtdblock0, sector 0" during boot-up. Is there a problem on the board?
A: These messages indicate incorrect OOB records in the part of the flash where the
bootloader is stored and are due to the version of SAM-BA which is used to write the various
parts of the bootloader. For all pracical reasons the above messages are harmless.
Q: The I/O operations are slow when using the on-board nand flash or USB flash drive.
A: When doing a sequential read/write (e.g. one single large file) flash memories can be fast.
When reading/writing many small files the performance will be really low.
Q: How to boot from the on board DataFlash?
A: Make sure that NANDF_E jumper is not connected and DF_E jumer is connected. If the
dataflash has been correctly programmed, the board should start up.
Q: Is the SD/MMC card supported?
A: The SD/MMC card is fully supported, including detection of card insertion/removal and
write lock
Q: What do the two LED's indicate?
A: These two leds are driven by default by the linux LED driver. The STAT LED is switched
on NAND memory access. The PWR_LED LED is blinking with a distinctive heartbeat
pattern and a frequency that depends on the system load.
Q: The system time is lost after reset, how to avoid that?
A: Unfortunately the Linux AT91SAM9 RTC driver is not yet operational. When it is
completed, you would just need a standard 3V battery at the socket at the back of the board.
Until then please set the date manually or use a network time synchronization utility as
ntpdate. Note also that AT91SAM9260 chips have a RomBOOT errata issue where
RomBOOT incorrectly resets the RTT on every system reset.
Using JTAG to program the board
A sample project is provided in the “TEST_BUTT” directory that demonstrates how
Common Questions