Datasheet

 2011 Microchip Technology Inc. DS22288A-page 11

MCP2210

3.0 USB COMMANDS/RESPONSES

DESCRIPTION

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.

The MCP2210 USB commands can be grouped by

their provided features as follows:

• NVRAM Settings

- Read/Write NVRAM related parameters

- Send access password

• Read/Write RAM Settings (copied from NVRAM

at power-up or Reset):

- Read/Write (volatile – RAM stored settings)

SPI transfer settings

- 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

• Read/Write EEPROM Memory

• External Interrupt Pin (GP6) Event Status

• SPI Data Transfer:

- 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

TABLE 3-1: COMMAND STRUCTURE

Byte Index Meaning

0 0x60 – Set Chip NVRAM Parameters – command code

1 0x20 – Set Chip Settings Power-up Default – sub-command code

2 0x00 – Reserved

3 0x00 – Reserved

4 GP0 Pin Designation

• GPIO = 0x00

• Chip Selects = 0x01