MCP2210 MICROCHIP [Microchip Technology], MCP2210 Datasheet - Page 29

• Manufacturer Part Number: MCP2210
• Description: USB-to-SPI Protocol Converter with GPIO (Master Mode)
• Manufacturer: MICROCHIP [Microchip Technology]

3.1.8
TABLE 3-21:
3.1.8.1
TABLE 3-22:
FIGURE 3-8:
 2011 Microchip Technology Inc.
Index
Index
16-28
31-63
Byte
3-63
Byte
3-11
12
13
14
15
29
30
0
1
2
0
1
2
GET USB KEY PARAMETERS
0x61 – Get NVRAM Settings – command code
0x30 – Get USB Key Parameters – sub-command code
0x00 – Reserved
0x00 – Reserved
0x61 – Get NVRAM Settings – echos back the given command code
0x00 – Command Completed Successfully
0x30 – Sub-command Echoed Back for Get USB Key Parameters code
Don’t care
VID low byte
VID high byte
PID low byte
PID high byte
Don’t care
Chip Power Option (as per USB specs – Chapter 9)
• Bit 7 – Host Powered
• Bit 6 – Self Powered
• Bit 5 – Remote Wake-up Capable
• Bit 4 – Don’t Care
• Bit 3 – Don’t Care
• Bit 2 – Don’t Care
• Bit 1 – Don’t Care
• Bit 0 – Don’t Care
Requested Current Amount from USB Host (quanta of 2 mA)
Don’t Care
Responses
Example: For 100 mA this byte index will have a value of 50 (in decimal) or 0x32.
COMMAND STRUCTURE
RESPONSE 1 STRUCTURE
GET USB KEY PARAMETERS LOGIC FLOW
Get NVRAM USB
Key Parameters
Key Parameters
Response 1
NVRAM USB
Retrieved
Meaning
Meaning
MCP2210
DS22288A-page 29