Microchip Technology ADM00419 Data Sheet
2011 Microchip Technology Inc.
DS22288A-page 31
MCP2210
3.1.10
GET USB PRODUCT NAME
3.1.10.1
Responses
FIGURE 3-10:
GET USB PRODUCT NAME LOGIC FLOW
TABLE 3-25:
COMMAND STRUCTURE
Byte
Index
Meaning
0
0x61 – Get NVRAM Settings – command code
1
0x40 – Get USB Product Name – sub-command code
2
0x00 – Reserved
3-63
0x00 – Reserved
TABLE 3-26:
RESPONSE 1 STRUCTURE
Byte
Index
Meaning
0
0x61 – Get NVRAM Settings – echos back the given command code
1
0x00 – Command Completed Successfully
2
0x40 – Sub-command Echoed Back for Get USB Product Name code
3
Don’t Care
4
Total USB String Descriptor Length (this is the length of the Product string multiplied by 2 + 2)
Example: “MCP2210 USB to SPI Master” has 25 Unicode characters
- The retrieved value is: (25 x 2) + 2 = 52 (decimal) = 0x34
5
USB String Descriptor ID – always 0x03
6
Unicode Character Low byte
Example: For the “MCP2210 USB to SPI Master” Unicode string, there will be the low byte of the
Unicode for character “M”.
- This byte index will have a value of 0x4D
7
Unicode Character High byte
Example: For the “MCP2210 USB to SPI Master” Unicode string, there will be the high byte of the
Unicode for character “M”.
- This byte index will have a value of 0x00
8-63
Remaining Unicode Characters
Get NVRAM USB
Product Name
Response 1
NVRAM USB
Product Name
Retrieved