#Atmel dragon pinout serial#

The peripheral multiplexer value in PMUXn is ignored. Writing a zero to this bit allows the PORT to control the pad direction via the Data Direction register (DIR) and output drive value via the Data Output Value register (OUT). (PMUXn) to enable or disable alternative peripheral control over an I/O pin direction and output drive This bit enables or disables the peripheral multiplexer selection set in the Peripheral Multiplexing register Without knowing the specific setup you need, I cannot give further guidance.Д«it 0 вЂ“ PMUXEN: Peripheral Multiplexer Enable The other bits in PINCFGy must also be appropriately set. Programme the PMUX register(s) appropriately (see section 23.7).Д®nable the multiplexed function in PINCFGy by setting the PMUXEN bit for the specific pin. Turn on the clock associated with the function (or any writes to the peripheral are ignored - see the power manager module) PB13 for example, has alternate functions inДЄ: EXTINT which attaches to the interrupt controller if selected.Д¬ -> SERCOM (serial module controller) number four which will attach to PAD1 as documented in the SERCOM chapter in the datasheet.Д® and F permit the pin to operate as part of the Timer / Counter moduleДЇunction G attaches the pin to the I2S (audio) module.ДЇunction H attaches the pin as a generic clock (See the clock description in section 14 for details). To the right are alternate functions (if any exist) of A to H.

#Atmel dragon pinout serial#

This tells me that I can only use pins with I2C against them for the serial control unit(s) to be able to use an I2C interface. Refer to ElectricalД¬haracteristics for details on the I2C pin characteristics.

See the Type column for using a SERCOM pin in I2C mode.

Only some pins can be used in SERCOM I2C mode.

In the next column, we see I2C - this is explained in note 3: To the right of here is the supply pin(s) that actually power this I/O bit. The next part is the port bit attached to the pin itself. On the left is the physical pin (if it exists - depends on how many pins the package has and controller variant). The default pin function for all standard I/O pins is an ordinary digital I/O port (See the copied text from the datasheet at the bottom).ДЄs an example, I will take a couple of lines from the table in question: This part is not much different from many variants using ARM Mx cores with multiple peripheral mappings. It is not unusual to see multifunction I/O pins on microcontrollers, so the tables in the datasheet (particularly table 7.1) identify the alternate functions associated with each pin (and by extension, the peripheral they can attach to internally). If anyone did start with a bare SAMD21, I would really appreciate some guidance about how did you set up the chip. Since I am using the bare SAMD21 I believe that the pins does not even have a default set. So basically, you can set any of these pins if you need extra ports for I2C, SPI or UART. This show basically the default value for each pin, using an arduino zero board as reference Pin Default SERCOM SERCOM alt Is there a conversion table that show what these entry mean? I am a SW engineer, so this is my first attempt at reading a datasheet for a processor.ДЇound some info online, after looking for SERCOM.ДЇrom my understanding, the SAMD21 has programmable pins, but there are some that are set as default for communication related to I2C, SPI and UART. I did search in the section related to pinout, but there is only this table, which while it tell me if the pin is a I2C or SPI, it doesn't give me any context to translate in what I would see on a breakout board for example. I was expecting something like 'SPI MOSI' or 'Serial TX' and such instead the table has a ton of entry that does not look like anything that I recognize.ДЇor example Pin 13 is PA08, as type it is mentioned as I2C, and the rest of the line has entry like NMI AIN X SERCOM0/Pad0 SERCOM2/Pad0 TCC0/WO TCC1/WO I2S/SD

I did read the pinout, which has names like PA00, PB03 and so on reading in the multiplexed section, I see a table with each pin, but I can't get what it actually does. I am looking for a way to actually read an Atmel processor (SAMD-21) pin setup but I am not sure how do you actually get the right info from the data sheet.