Microchip Technology ADM00421 Fiche De Données
2011 Microchip Technology Inc.
DS22288A-page 59
MCP2210
3.6
Chip Status
The chip status command is used to retrieve status information regarding the state of the SPI transfer engine.
3.6.1
GET MCP2210 STATUS
3.6.1.1
Responses
FIGURE 3-26:
GET MCP2210 STATUS LOGIC FLOW
TABLE 3-69:
COMMAND STRUCTURE
Byte Index
Meaning
0
0x10 – Get MCP2210 Status – command code
1
0x00 – Reserved
2
0x00 – Reserved
3-63
0x00 – Reserved
TABLE 3-70:
RESPONSE 1 STRUCTURE
Byte
Index
Meaning
0
0x10 – Get MCP2210 Status – echos back the given command code
1
0x00 – Command Completed Successfully
2
SPI Bus Release External Request Status
• 0x01 – No External Request for SPI Bus Release
• 0x00 – Pending External Request for SPI Bus Release
• 0x01 – No External Request for SPI Bus Release
• 0x00 – Pending External Request for SPI Bus Release
3
SPI Bus Current Owner
• 0x00 – No Owner
• 0x01 – USB Bridge
• 0x02 – External Master
• 0x00 – No Owner
• 0x01 – USB Bridge
• 0x02 – External Master
4
Attempted Password Accesses – informs the USB host on how many times the NVRAM password
was tried
was tried
5
Password Guessed
• 0x00 – Password Not Guessed
• 0x01 – Password Guessed
• 0x00 – Password Not Guessed
• 0x01 – Password Guessed
6-63
Don’t Care
Get MCP2210
Status
Response 1
MCP2210 Status
Information
Retrieved