USB4715

DS00002514B-page 4

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2022 Microchip Technology Inc. and its subsidiaries

1.2

Buffer Types

1.3

Pin Reset States

The pin reset state definitions are detailed in Table 1-3. Refer to Section 3.0, "Pin Descriptions and Configuration" for

details on individual pin reset states.

TABLE 1-2:

BUFFER TYPE DESCRIPTIONS

Buffer

Description

I

Input.

IS

Input with Schmitt trigger.

O4

Output buffer with 4mA sink and 4mA source.

O12

Output buffer with 12mA sink and 12mA source.

OD12

Open-drain output with 12mA sink.

PU

Internal pull-up. Unless otherwise noted in the pin description, internal pull-ups are

always enabled.

Internal pull-up resistors prevent unconnected inputs from floating. Do not rely on

internal resistors to drive signals external to the device. When connected to a load that

must be pulled high, an external resistor must be added.

PD

Internal pull-down. Unless otherwise noted in the pin description, internal pull-downs

are always enabled.

Internal pull-down resistors prevent unconnected inputs from floating. Do not rely on

internal resistors to drive signals external to the device. When connected to a load that

must be pulled low, an external resistor must be added.

ICLK

Crystal oscillator input pin.

OCLK

Crystal oscillator output pin.

I/O-U

Analog input/output defined in USB specification.

I-R

RBIAS.

A

Analog.

P

Power pin.

TABLE 1-3:

PIN RESET STATE LEGEND

Symbol

Description

A/P

Analog/Power Input

Z

Hardware disables output driver (high impedance)

PD-15k

Hardware enables internal 15kΩ pull-down

PD-67k

Hardware enables internal 67kΩ pull-down

PU-67k

Hardware enables internal 67kΩ pull-up

USB

USB line