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MCP2210 Datasheet(PDF) 11 Page - Microchip Technology |
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MCP2210 Datasheet(HTML) 11 Page - Microchip Technology |
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11 / 82 page  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 • Dedicated Function pin = 0x02 5 GP1 Pin Designation • GPIO = 0x00 • Chip Selects = 0x01 • Dedicated Function pin = 0x02 6 GP2 Pin Designation • GPIO = 0x00 • Chip Selects = 0x01 • Dedicated Function pin = 0x02 7 GP3 Pin Designation • GPIO = 0x00 • Chip Selects = 0x01 • Dedicated Function pin = 0x02 8 GP4 Pin Designation • GPIO = 0x00 • Chip Selects = 0x01 • Dedicated Function pin = 0x02 |
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