USB82642 datasheet(5/64 Pages) MICROCHIP

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DS60001253F-page 5

USB82642

1.1

Device Features

1.1.1

HARDWARE FEATURES

• Single-chip hub, flash media controller, and I2C device control over USB

• USB82642 supports the temperature range of -40 °C to +85 °C

• Transaction Translator (TT) in the hub supports operation of FS and LS peripherals

• Full power management with individual or ganged power control of each downstream port

• Optional support for external firmware access via SPI interfaces

• Code execution via SPI ROM which must meet the following qualifications:

- 60 MHz operation support

- Single bit or dual bit mode support

- Mode 0 or mode 3 SPI support

Compliance with the following flash media card specifications:

• Secure Digital 2.0

- SDSC, SDHC, and SDXC

- mircoSD and reduced form factor media

- SDIO - using the SDIO over USB bridge

- Supports storage addressability of up to 2 TB

• MultiMediaCard 4.2

- 1/4/8 bit

- Includes support for eMMC devices

• Control of I2C device using the I2C over USB bridge

• Supports internal regulator for 1.8 V core operation

• Supports external regulator for 1.8 V core operation

1.1.2

CONFIGURABLE HUB FEATURES

Default configuration is loaded by USB82642 following a reset. The USB82642 may also be configured by an external

I2C EEPROM or external SPI ROM flash, where the following features are supported:

• Customizable vendor ID, product ID, and device ID

• 12-hex digits maximum for the serial number string

• 29-character manufacturer ID and product strings for flash media reader/writer

• Compound device support on a port-by-port basis

- a port is permanently hardwired to a downstream USB peripheral device

• Select over-current sensing and port power control on an individual or ganged (all ports together) basis to match

the circuit board component selection

• Port power control and over-current detection/delay features

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

• Configure the delay time for turning on downstream port power

• Bus- or self-powered selection

• Hub port disable of non-removable configurations

• Flexible port mapping and disable sequencing supports multiple platform designs

• Programmable USB differential-pair pin location selection eases PCB layout by aligning USB signal lines directly

to connectors

• Programmable USB signal drive strength improves USB signal integrity using 4 levels of signal drive strength

• Indicate the maximum current that the 2-port hub consumes from the USB upstream port

• Manage the maximum current required for the hub controller

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