A detailed mechanical descrip- tion is given in the section Mechanical Characteristics of the full datasheet. Figure lead LQFP Package Pinout ( Top View). AT91SAM7S-EK Evaluation Board User Guide . One CD-ROM containing summary and full datasheets, datasheets with electrical and. AT91SAM7S Microchip Technology / Atmel ARM Microcontrollers – MCU datasheet, inventory, & pricing.

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Atmel ARM-based processors – Wikipedia

Atmel made efforts to adapt advanced peripherals and power management that used very little datadheet and can operate independently without having the CPU core powered up sleepwalking. Is the 55 MHz spec only good for running at a higher voltage than the spec recommends that wouldn’t make sense to me? I had my flash wait state set to 1 which is acceptable at 55 MHz according to the datasheetbut I tried changing it to 2 and it works now.

Arduino and List of Arduino boards and compatible systems. AT91SAM7S system interrupt Dave Sudolcan I have a small test program where the only interrupt I’ve enabled is the periodic interval timer, and it’s been configured to generate 1-msec interrupts. Also, the 55 Mhz always works fine if I’m running in debug mode, which really confuses me.

Sorry to have to admit it was due to cockpit error. All articles with dead external links Articles with dead external at91sxm7s from October Dagasheet with permanently dead external links. Retrieved from ” https: Any ideas why I need to set my flash wait state to 2 to get it to work?


By using this site, you agree to the Terms of Use and Privacy Policy. As far as i understand the crystal is the input to the Main Oscillator which runs at the same frequency as the crystal. From Wikipedia, the free encyclopedia. Hopefully this reply will fix that. Here’s my system peripheral ISR code, minus all the define’s to keep this post shorter.


The data sheet lists that an up to 20 Mhz crystal can be connected and the summary says that the oscillator runs at up to 55 MHz – is the crystal frequency multiplied by 2. Who is online Users browsing this forum: Each power supply pin is decoupled using a n X7R capacitor.

Important information This site uses cookies to store information on your computer. Lastly, probing my crystal shows that it is generating an 8 Mhz sine wave in all the above cases.

Contribute to this website by clicking the Donate button. So I’m up and running now thanks to your suggestion, but I’m still puzzled as to why I need to set my flash wait state to 2. Post Maximum MCK at 3. In any case, 50 MHz at 3. Archived from the original on Thanks, orc Reply Start a New Thread. This pin could also be pulled permanently to GND. Let me know if you have any ideas.


I do not need to know how yet, because I’m only designing the hardware and need to pass the design to our PCB-layouter for layout very soon – just need to know if it is possible at all or if I need to have additional X-oscillators for the ADC’s etc. The values of the RC filter components connected to the PLLRC pin need to be calculated depending on what clock speed the microcontroller will be operated at.

Datasheft ARM-based processors are microcontrollers and microprocessors integrated circuitsby Atmel a subsidiary of Microchip Technologythat are based on various bit ARM processor cores, with Atmel-designed peripherals and tool support.

ARM licenses the core design for a series of bit processors. As you can see, I tried putting infinite loops in all the unexpected interrupt handlers.

Microcontrollers have internal program memory as well as the conventional internal registers and RAM. Create free account Forgot password?

Equinox Products Page – ISPnano- Atmel AT91SAM7 – ARM7 JTAG Device Library Licence

Computer science portal Electronics portal. Sorry for the ugliness of the below code. Look at the description of PLL.