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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