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AT90USB162 Datasheet(PDF) 12 Page - ATMEL Corporation |
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AT90USB162 Datasheet(HTML) 12 Page - ATMEL Corporation |
12 / 28 page 12 7618C–AVR–07/08 4.7.4 Answers from the Device to a Blank Check Command The Host controller sends a GET_STATUS request to the device. Once internal blank check has been completed, the device sends its status. • If the device status is “OK”: the device memory is then blank and the device waits for the next Host request. • If the device status is “errCHECK_ERASED”: the device memory is not blank. The device waits for an DFU_UPLOAD request to send the first address where the byte is not 0xFF. 4.8 Reading Configuration Information or Manufacturer Information The flow described hereafter allows the user to read the configuration or manufacturer information. 4.8.1 Requests From Host To start the programming operation, the Host sends DFU_DNLOAD request with the Read com- mand in the data field (2 bytes). 4.8.2 Answers from Bootloader The device has two possible answers to a DFU_GETSTATUS request: • If the chip is protected from program access, an “err_VENDOR” status is returned to the Host. • Otherwise, the device status is “OK“. The Host can send a DFU_UPLOAD request to the device in order to get the value of the requested field. Command Identifier data[0] data[1] data[2] data[3] data[4] Description Id_read_command 05h 00h 00h Read Bootloader Version 01h Read Device boot ID1 02h Read Device boot ID2 01h 30h Read Manufacturer Code 31h Read Family Code 60h Read Product Name 61h Read Product Revision OUT Read_command (2 bytes) SETUP DFU_DNLOAD IN ZLP |
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