Datasheet

416
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
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.
24.5.3.1 Enumeration Process
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.
24.5.3.2 Communication Endpoints
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.
Table 24-3. Handled Standard Requests
Request Definition
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.
Table 24-4. Handled Class Requests
Request Definition
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.