MCP2210
• Read/Write RAM Settings (copied from NVRAM
at power-up or Reset):
3.0
USB COMMANDS/RESPONSES
DESCRIPTION
- Read/Write (volatile – RAM stored settings)
SPI transfer settings
MCP2210 implements the HID interface for all the
device-provided functionalities. The chip uses a
command/response mechanism for the USB engine.
This means that for every USB command sent (by the
USB host) to the MCP2210, it will always reply with a
response packet.
- Read/Write (volatile – RAM stored settings)
chip settings
- Read/Write (volatile – RAM stored settings)
GPIO direction
- Read/Write (volatile – RAM stored settings)
GPIO output values
The MCP2210 USB commands can be grouped by
their provided features as follows:
• Read/Write EEPROM Memory
• External Interrupt Pin (GP6) Event Status
• SPI Data Transfer:
• NVRAM Settings
- Read/Write NVRAM related parameters
- Send access password
- Read/Write SPI transfer data
- Cancels the ongoing SPI transfer
- SPI bus release manipulation
• Chip Status and Unsupported commands
3.1
NVRAM Settings
The commands in this category are related to the NVRAM settings manipulation.
3.1.1
SET CHIP SETTINGS POWER-UP DEFAULT
COMMAND STRUCTURE
TABLE 3-1:
Byte Index
Meaning
0
1
2
3
4
0x60 – Set Chip NVRAM Parameters – command code
0x20 – Set Chip Settings Power-up Default – sub-command code
0x00 – Reserved
0x00 – Reserved
GP0 Pin Designation
• GPIO = 0x00
• Chip Selects = 0x01
• Dedicated Function pin = 0x02
GP1 Pin Designation
5
6
7
8
• GPIO = 0x00
• Chip Selects = 0x01
• Dedicated Function pin = 0x02
GP2 Pin Designation
• GPIO = 0x00
• Chip Selects = 0x01
• Dedicated Function pin = 0x02
GP3 Pin Designation
• GPIO = 0x00
• Chip Selects = 0x01
• Dedicated Function pin = 0x02
GP4 Pin Designation
• GPIO = 0x00
• Chip Selects = 0x01
• Dedicated Function pin = 0x02
2011 Microchip Technology Inc.
DS22288A-page 11
MICROCHIP [ MICROCHIP ]
