MCP2221AT-ISLASHML datasheet(54/80 Pages) MICROCHIP

54 / 80 page

MCP2221A

DS20005565A-page 54

 2016 Microchip Technology Inc.

7Bit 7

Don’t

care

Bit 6: Interrupt detection – negative

edge

If set, the interrupt detection flag will be set when a

negative edge occurs

Bit 5: Interrupt detection – positive edge

If set, the interrupt detection flag will be set when a

positive edge occurs

Bit 4-3: ADC Reference Voltage

Reference voltage is 4.096V (only if VDD is above this

voltage)

Reference voltage is 2.048V

Reference voltage is 1.024V

Reference voltage is off (this is useful for the case in

which the ADC uses other reference than VRM DAC;

e.g., VDD)

Bit 2: ADC Reference Option

ADC reference is VRM ADC

ADC reference is VDD

Bit 1

Don’t

care

Bit 2

Don’t

care

Lower byte of the 16-bit USB VID value

Higher byte of the 16-bit USB VID value

Lower byte of the 16-bit USB PID value

Higher byte of the 16-bit USB PID value

USB power attributes

This value will be used by the MCP2221A’s USB

Configuration Descriptor (power attributes value) during

the USB enumeration

USB requested number of mA(s)

The requested mA value during the USB enumeration

will represent the value at this index multiplied by 2

Current supplied-password byte 1

Current supplied-password byte 2

Current supplied-password byte 3

Current supplied-password byte 4

Current supplied-password byte 5

Current supplied-password byte 6

Current supplied-password byte 7

Current supplied-password byte 8

TABLE 3-39:

RESPONSE 1 STRUCTURE (CONTINUED)

Byte

Index

Function Description

Value

Effect

MCP2221AT-I/ML Datasheet(PDF) 54 Page - Microchip Technology

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