Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

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Windows XP. The CDC document, available at www.usb.org, describes a way to implement devices such as ISDN 

modems and virtual COM ports. 
The Vendor ID (VID) is Atmel’s vendor ID 0x03EB. The product ID (PID) is 0x6124. These references are used by 

the host operating system to mount the correct driver. On Windows systems, the INF files contain the 

correspondence between vendor ID and product ID. 
For More details about VID/PID for End Product/Systems, please refer to the Vendor ID form available from the 

USB Implementers Forum:

http://www.usb.org/developers/vendor/VID_Only_Form_withCCAuth_102407b.pdf

"Unauthorized use of assigned or unassigned USB Vendor ID Numbers and associated Product ID Numbers is 

strictly prohibited."
Atmel provides an INF example to see the device as a new serial port and also provides another custom driver 

used by the SAM-BA application: atm6124.sys. Refer to the document “USB Basic Application”, 

literature number 

6123

, for more details.

The USB protocol is a master/slave protocol. This is the host that starts the enumeration sending requests to the 

device through the control endpoint. The device handles standard requests as defined in the USB Specification.

The device also handles some class requests defined in the CDC class.

Unhandled requests are STALLed.

There are two communication endpoints and endpoint 0 is used for the enumeration process. Endpoint 1 is a 64-

byte Bulk OUT endpoint and endpoint 2 is a 64-byte Bulk IN endpoint. SAM-BA Boot commands are sent by the 

host through endpoint 1. If required, the message is split by the host into several data payloads by the host driver. 
If the command requires a response, the host can send IN transactions to pick up the response.

GET_DESCRIPTOR

Returns the current device configuration value.

SET_ADDRESS

Sets the device address for all future device access.

SET_CONFIGURATION

Sets the device configuration.

GET_CONFIGURATION

Returns the current device configuration value.

GET_STATUS

Returns status for the specified recipient.

SET_FEATURE

Set or Enable a specific feature.

CLEAR_FEATURE

Clear or Disable a specific feature.

SET_LINE_CODING

Configures DTE rate, stop bits, parity and number of 

character bits.

GET_LINE_CODING

Requests current DTE rate, stop bits, parity and number 

of character bits.

SET_CONTROL_LINE_STATE

RS-232 signal used to tell the DCE device the DTE 

device is now present.