USB2640 datasheet(4/60 Pages) MICROCHIP

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USB2640/USB2641

DS00001947C-page 4

 2015-2021 Microchip Technology Inc.

1.0

OVERVIEW

The Microchip USB2640/USB2641 is an integrated USB 2.0 compliant, Hi-Speed hub for USB port expansion with an

attached bulk only mass storage class peripheral controller. This multi-format flash media controller and USB Hub

Combo features three downstream ports: one port is dedicated to an internally connected ultra fast flash media

reader/writer and two exposed downstream ports are available for external peripheral expansion.

The Microchip USB2640/USB2641 is an ultra fast, OEM-configurable, hub controller IC with three downstream ports for

embedded USB solutions. The USB2640/USB2641 will attach to an upstream port as a Full-Speed Hub or as a Full-/Hi-

Speed Hub. The hub supports Low-Speed, Full-Speed, and Hi-Speed (if operating as a Hi-Speed Hub) downstream

devices on all of the enabled downstream ports.

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

and D– pins 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 USB2640/USB2641 includes programmable features such as:

PortMap which provides flexible port mapping and disable sequences. The downstream ports of a USB2640/USB2641

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

port that is disabled, the USB2640/USB2641 automatically reorders the remaining ports to match the USB host control-

ler’s port numbering scheme.

PortSwap which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment

of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the USB differential signals on the

PCB.

PHYBoost which enables four programmable levels of USB signal drive strength in downstream port transceivers.

PHYBoost attempts to restore USB signal integrity that has been compromised by system level variables such as poor

PCB layout, long cables, etc.

1.1

Device Features

1.1.1

Hardware Features

• Single chip flash media controller

• 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 interface

- 30 MHz or 60 MHz operation support

- Single bit or dual bit mode support

- Mode 0 or mode 3 SPI support

Compliant with the following flash media card specifications:

• Secure Digital 2.0 / MultiMediaCard 4.2

- SD 2.0, HS-SD, HC-SD

- TransFlash™ and reduced form factor media

- 1/4/8 bit MMC 4.2

• MMC streaming mode support

• Memory Stick 1.43

• Memory Stick Pro Format 1.02

• Memory Stick Pro-HG Duo Format 1.01

- Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro

• Memory Stick Duo 1.10

• xD-Picture Card 1.2 (USB2640 only)

• On board 24 MHz crystal driver circuit

• Optional external 24 MHz clock input

- Must be used with an external resistor divider to provide a 1.8 V signal

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