USX2064 datasheet(4/54 Pages) MICROCHIP

4 / 54 page

USX2064

DS00001986E-page 4



2023 Microchip Technology Inc and its subsidiaries.

1.0

INTRODUCTION

The Microchip USX2064 is a low-power, configurable, MTT (multi transaction translator) hub controller IC. The hub pro-

vides 4 downstream ports for embedded USB solutions and is fully compliant with the USB 2.0 Specification [1]. The

Microchip hub controller can attach to an upstream port as a full-speed or full-/hi-speed hub. The hub can support low-

speed, full-speed, and hi-speed downstream devices when operating as a hi-speed hub.

All required resistors on the USB ports are integrated into the hub. This includes all series termination resistors and all

required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream facing

ports have internal pull-up resistors.

The USX2064 hub includes programmable features, such as:

•

MultiTRAKTM Technology: implements a dedicated Transaction Translator (TT) for each port. Dedicated TTs help

maintain consistent full-speed data throughput regardless of the number of active downstream connections.

•

PortMap: provides flexible port mapping and disable sequences. The downstream ports of a USX2064 hub can

be reordered or disabled in any sequence to support multiple platform designs with minimum effort. For any port

that is disabled, the USX2064 hub controller automatically reorders the remaining ports to match the USB host

controller’s port numbering scheme.

•

PortSwap: allows direct alignment of USB signals (D+/D-) to connectors to avoid uneven trace length or crossing

of the USB differential signals on the PCB.

•

PHYBoost: enables 4 programmable levels of USB signal drive strength in downstream port transceivers. PHY-

Boost will also attempt to restore USB signal integrity.

1.1

Configurable Features

The Microchip USX2064 hub controller provides a default configuration that may be sufficient for most applications.

Strapping option pins (see Section 3.3.1 on page 11) provide additional features to enhance the default configuration.

When the hub is initialized in the default configuration, the following features may be configured using the strapping

options:

• Downstream non-removable ports, where the hub will automatically report as a compound device

• Downstream disabled ports

• Downstream port power control and over-current detection on a ganged or individual basis

• USB signal drive strength

• USB differential pair pin location

The USX2064 hub controller can alternatively be configured by an external I2C EEPROM or a microcontroller as an

SMBus slave device, providing the following configurable features:

• Support for compound devices on a port-by-port basis

• Selectable over-current sensing and port power control on an individual or ganged basis to match the circuit board

component selection

• Customizable vendor ID, product ID, and device ID

• Configurable delay time for filtering the over-current sense inputs

• Configurable downstream port power-on time reported to the host

• Indication of the maximum current that the hub consumes from the USB upstream port

• Indication of the maximum current required for the hub controller

• Custom string descriptors (up to 31 characters):

- Product, Manufacturer, and Serial number

• Battery charging

USX2064 Datasheet(PDF) 4 Page - Microchip Technology

USX2064 Datasheet(HTML) 4 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL