at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 87

• Manufacturer Part Number: at91sam9260-cj
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

13.6.3.2
13.7
6221G–ATARM–31-Jan-08
Hardware and Software Constraints
Communication Endpoints
Table 13-9.
The device also handles some class requests defined in the CDC class.
Table 13-10. Handled Class Requests
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 the 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 13-11. User Area Address
The SPI and NAND Flash drivers use several PIOs in alternate functions to communicate with
devices. Care must be taken when these PIOs are used by the application. The devices con-
Request
GET_STATUS
SET_FEATURE
CLEAR_FEATURE
Request
SET_LINE_CODING
GET_LINE_CODING
SET_CONTROL_LINE_STATE
Start Address
0x200000
• SAM-BA boot disposes of two blocks of internal SRAM. The first block is available for user
• The DataFlash and NAND Flash downloaded code size must be inferior to 4096 bytes.
• The code is always downloaded from the device address 0x0000_0000 to the address
• The downloaded code must be position-independent or linked at address 0x0000_0000.
• The DataFlash must be connected to NPCS0 and/or NPCS1 of the SPI.
• USB requirements:
code. Its size is 4K bytes The second block is used for variables and stacks.
0x0000_0000 of the internal SRAM (after remap).
– Crystal or Input Frequencies supported by Software Auto-detection. See
Table 13-2
Handled Standard Requests (Continued)
and
Table 13-3 on page 77
End Address
0x201000
Definition
Returns status for the specified recipient.
Used to set or enable a specific feature.
Used to clear or disable a specific feature.
Definition
Configures DTE rate, stop bits, parity and number of
character bits.
Requests current DTE rate, stop bits, parity and number of
character bits.
RS-232 signal used to tell the DCE device the DTE device
is now present.
for more information.
Size (bytes)
4096
AT91SAM9260
Table
13-1,
87