| Name |
Description |
 HOT TOPICS |
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Kits |
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General |
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Packaging |
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Software & Tools |
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Quality Information Request |
How can I get AT91SAM Quality and Reliability information ? ... |
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SDRAM Burst Length |
What is the SDRAM Burst Length? |
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Maximum NandFlash size |
What is the maximum NandFlash size I can interface? |
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LCD Controller BGR/RGB compliant |
Is my AT91SAM9 LCD Controller BGR or RGB compliant? |
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Nandflash compatibility with the BootROM - Block 0 valid without ECC |
AT91SAM9 NANDFlash Boot requires NandFlash with blo... |
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Use of LDM/STM with PDC |
How to reduce the impact of LDM and STM instructions on PDC d... |
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Errata on SAM9G45 / SAM9M10 CU-ES and CU-ES2 revision A Devices (Engineering Samples of rev A only) |
Errata on SAM9G45 / SAM9M10 CU-ES and CU-ES2 revision A Devic... |
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Can I use a Programmable Clock Output (PCKx pin) to clock my Ethernet PHY? |
Can I use a Programmable Clock Output (PCKx pin) to clock my ... |
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TWI clock is less than specified |
TWI clock is less than specified |
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Communication with the TWI fails |
Communication with the TWI fails |
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TWI ends the transfer by sending a STOP condition in Master Transmitter Mode |
TWI ends the transfer by sending a STOP condition in Master T... |
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How to use the CDC version of SAM-BA? |
How to use the CDC version of SAM-BA ? |
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Sample and Hold Time (SHTIM) versus Source Output Impedance |
Sample and Hold Time (SHTIM) versus Source Output Impedance ... |
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Why does the EBI seems frozen in some circumstances when i use the PC6/NWAIT pin as an I/O line ? |
Why does the EBI seems frozen in some circumstances when i us... |
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Which parts of the AT91 Family are 5V tolerant ? |
Which parts of the AT91 Family are 5V tolerant ? |
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Why does my LCD display become black when the ARM926 enters in idle state? |
I put the LCD frame buffer in internal SRAM. When the ARM926 ... |
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What is the rising/falling time of AT91SAM IOs? |
What is the rising/falling time of AT91SAM IOs? ... |
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What is the maximum supported LPDDR-SDRAM size for the SAM9G45 and SAM9M10 devices? |
What i... |
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SMC Chip Select Configuration update |
Do we have any constraints when updating the SMC chip select ... |
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What is the maximum supported DDR2-SDRAM size for the SAM9G45 and SAM9M10 devices? |
What is the maximum supported DDR2-SDRAM size for the SAM9G45... |
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Common connections of the AT91 products? |
What are the common connections of the AT91 products? BMS, NW... |
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SDRAM Chip Select remains low |
Why does my SDRAM Chip Select remain low? ... |
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Using PDC, how to toggle SPI Chip Select between each data transfer? |
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SDRAM Acronyms & Supported SDRAM Devices |
SDRAM Acronyms & Supported SDRAM Devices |
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Tolerant PIO vs Compliant PIO |
What is the difference between Tolerant PIO and Compliant PIO... |
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What are the different clocks that need to be enabled for the USB Host or the LCD Controllers on the SAM9261? |
What are the different clocks that need to be enabled for the... |
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AT91SAM7S devices over consumption on VDDIO in low power mode |
When entering the AT91SAM7S devices in low power mode, I have... |
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DDR2 Hardware Considerations on SAM9G45 devices |
DDR2 Hardware Considerations on SAM9G45 devices |
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Use of external clock source signal instead of crystal |
Can I use external clock source to on-chip input pin instead ... |
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AT91RM9200 SDRAM in 16-bit data bus mode |
How do I connect an SDRAM to AT91RM9200 in 16-bit data bus mo... |
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How to connect my Intel / Numonyx Strataflash ? |
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PLL Filter Calculator Fn Parameter |
What is the PLL Filter Calculator Fn Parameter? |
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PWM Channel Polarity Inversion |
When I disable one of the PWM Channels to reconfigure it and ... |
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Maximum SDRAM Clock speed |
What is the maximum SDRAM Clock speed? |
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PLL Filter |
What is the PLL Filter for? |
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Timer Counter Interrupt |
Why is the Timer Counter Interrupt only serviced once? |
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AT91SAM9261 revision B (AT91SAM9261B) DataFlash and Serial Flash Boot ROM limitation |
AT91SAM9261 revision B (AT91SAM9261B) DataFlash / Serial FLas... |
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Start and Stop bits of the USART in Synchronous Mode |
Is it possible to disable the Start bit and the Stop bit when... |
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Unused I/Os |
How to configure unused PIO? |
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Level on PLLRC Pin |
What is the PLLRC pin voltage level? |
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AT91SAM9G20 Boot ROM issues & SAM-BA Boot |
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High Speed USB Data Rate |
Is AT91SAM UDPHS reaching 480Mbps? |
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NWAIT control signal considerations |
NWAIT control signal considerations |
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NCS0 signal specification during Reset |
NCS0 signal specification during Reset |
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AT91SAM9 LCD Resolution |
Which maximum LCD TFT pan... |
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SDRAM tRC/tRFC wrong programming may decrease SDRAM performance |
SDRAM tRC/tRFC wrong programming may decrease SDRAM performan... |
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Not able to put the chip in ultra low power mode as specified in the datasheet |
How do I put the chip in ultra low power mode as specified in... |
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Are AT91 devices sensitive to frequency drift? |
Are AT91 devices sensitive to frequency drift? |
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How should I connect XIN and XOUT pins when main oscillator is used in Bypass Mode? |
How should I connect XIN and XOUT pins when main oscillator i... |
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Nandflash compatibility with the BootROM |
What are the parameters to check when choosing a nandflash as... |
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External Reset Circuitry |
Is an external RC circuitry necessary on the RST pin? |
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External Brown Out Detector (BOD) |
Do I need to add an external BOD IC to Flash based AT91SAM de... |
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Is the ARM7TDMI 32x8 Multiplier single-cycle? |
Is the ARM7TDMI 32x8 Multiplier single-cycle? |
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Sockets & Adapters for AT91 Products |
Where can I find Sockets & Adapters for AT91 Products ? ... |
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How do I access the JTAG boundary scan on the AT91M40800, AT91R40807, AT91R40008, AT91M40807, AT91F40816, AT91FR4081 and the ATFR40161? |
How do I access the JTAG boundary scan on the AT91M40800, AT9... |
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JTAG Clock Issues on ARM926EJ-S |
I can't succeed in connecting my ARM926EJ-S microcontroller e... |
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Does AT91M40800-33AI run at 40MHz ? |
Does AT91M40800-33AI run at 40MHz ? |
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Clock Management |
How to understand clock management within the AT91SAM datashe... |
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AT91EB40A's 66MHz 3.3v SMT Crystal Oscillator datasheet |
Where can I find the datasheet for the 66MHz 3.3v SMT Crystal... |
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JTAG Interface vs. JTAG/ICE Interface |
What is the difference between the JTAG Interface and the JTA... |
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Spurious Interrupt |
What is a Spurious Interrupt? |
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AT91RM9200, 32.768 kHz Crystal Oscillator, board design example (BGA Package) |
Do you have a board design example for place and route around... |
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Controller Area Network (CAN) Peripheral: How to Abort a message? |
I am trying to abort a Transmit CAN message. First of all, I ... |
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Core and IO voltage power-up sequence and constraint |
Core and IO voltage power-up sequence and constraint? |
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SDRAM software initialization |
On my custom board, I'm not able to load files with a size hi... |
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AT91SAM PLL jittering |
AT91SAM PLL jittering |
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Data Out Valid after NWR High Timing (EBI18) |
Is the EBI18 Timing the same when Standard Wait States are in... |
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CAN Controller Permanent Pending Interrupt |
If I enable either ERRA, ERRP, WARN or BOFF CAN bus state int... |
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AT91SAM7S debugging setup with interrupts and JTAG/ICE |
Why do interrupts not work correctly when debugging my applic... |
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How should I select compatible crystals for AT91 devices? |
How should I select compatible crystals for AT91 dev... |
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Does AT91 product family feature PWM generation ? |
Does AT91 product family feature PWM generation ? |
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My AT91RM9200 does not seem to work |
What are the critical signals? |
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AT91SAM9261 Recommended PLL Initialization (PMC_PLLICPR configuration) |
When do I need to configure the PMC_PLLICPR register? |
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Capacitances on Oscillator |
Do I have the correct capacitance values on my crystal? |
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AT91SAM7 and AT91SAM9XE Embedded Flash Write/Erase cycle number |
The AT91SAM7 or AT91SAM9XE datasheet states that the internal... |
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Ethernet Physical Layer Transceiver (PHY) supported by the AT91RM9200 |
Do you have part numbers for Ethernet Physical Layer Transcei... |
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Ethernet switch Interfacing |
How do I interface an Ethernet switch with an AT91RM9200 to p... |
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Different Maximum running frequencies given according to the Atmel 's Documentations |
There are several running frequencies given according to the ... |
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Multi-ICE JTAG and Debugger Connection Issues |
When I connect the Multi-ICE to my target and start my debugg... |
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32-bit Internal memory access modes |
What are the access modes for Internal SRAM : Byte (8-bit), H... |
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AT91 MIPS performances |
AT91 ARM7TDMI-Based Microcontrollers MIPS performances ? |
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AT91 SPI Bus Protocol Mode: CPOL-CPHA-NCPHA |
AT91 SPI Bus Protocol Mode: CPOL-CPHA-NCPHA |
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AT91R40807, AT91FR4081, AT91FR40161 Internal 128-Kbyte SRAM Memory Protection |
I cannot write into the Internal 128-Kbyte SRAM memory, why ?... |
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AT91RM9200 Boot Rom problem using 8-bit parallel memories on NCS0 |
Problem when trying to use the internal Boot Rom to access to... |
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AT91RM9200 Boundary Scan |
How can I manage the SDRAM by boundary scan for the AT91RM920... |
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AT91SAM RTT Issues |
What are the different issues regarding the possible clocks a... |
