USB5537B datasheet(5/79 Pages) MICROCHIP

5 / 79 page

 2012 - 2015 Microchip Technology Inc.

DS00001682C-page 5

USB5537B

As shown on the Product Identification System page, three USB5537B firmware versions are available: “-5000”, “-6070”,

and “-6080”. These options differ in the following ways:

• The Dynamic Charging Port feature and related DYNCPDIS_N pin function are only available on the -6070 and -

6080 devices. Refer to Section 5.1.3, "Dynamic Charging Port (6070 and 6080 Only)" for additional details.

• The TRST/DYNCPDIS_N/UCS_SMBALERT_N pin buffer type is “IPU” in the -6070 and -6080 devices and “I” in

the -5000 device. Refer to Pin Information on page 7 for additional details.

• The Global Suspend power consumption has been significantly lowered in the -6070 and -6080 device. Refer to

Section 6.3, "Power Consumption" for additional details.

• The three USB 2.0 ports are configured as removable by default in the -6070 device. The three USB 2.0 ports are

configured as non-removable by default in the -5000 and -6080 devices.

1.3

Configurable Features

The USB5537B hub controller provides a default configuration that is sufficient for most applications. When initialized

in the default configuration, the following features may be configured:

• 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 USB5537B hub controllers can alternatively be configured by OTP or as an SMBus slave device. When configured

by an OTP or over SMBus, the following configurable features are provided:

• 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

• 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 30 characters): Product, manufacturer, and serial number

Note:

At the time of this writing, products with a USB Host (or products such as docking stations with USB hubs

that must be submitted with an attached host enabled platform) are eligible for USB logo with a mixture of

USB2.0 and USB3.0 ports. An example of such a product is a dedicated docking station that can only be

used with a specific model or family of laptops. In this example, the docking station is submitted for USB

logo testing with a laptop and it is tested as a system. USB devices containing a hub with an exposed

upstream port that can be plugged into any host platform through USB cables and connectors (examples

are USB enabled monitors, printers, hard drives, etc.) are not eligible for logo with a mixture of USB 3.0

and USB 2.0 ports. These devices will need to consume the USB 2.0-only ports internally in order to be

eligible for a USB logo.

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