8.0 Pin Reset States ........................................................................................................................................................................... 43
9.0 DC Parameters ............................................................................................................................................................................. 47
10.0 AC Specifications ........................................................................................................................................................................ 51
The Microchip Web Site ...................................................................................................................................................................... 57
Customer Change Notification Service ............................................................................................................................................... 57
Customer Support ............................................................................................................................................................................... 57
Product Identification System ............................................................................................................................................................. 58
2015-2018 Microchip Technology Inc.
DS00001947B-page 3
USB2640/USB2641
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
1.1.1
•
•
•
•
Device Features
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
DS00001947B-page 4
2015-2018 Microchip Technology Inc.
USB2640/USB2641
• 8051 8-bit microprocessor
- 60 MHz - single cycle execution
- 64 KB ROM; 9 KB RAM
• Internal regulator for 1.8 V core operation
• Optimized pinout improves signal flow, easing implementation and allowing for improved signal integrity treatment
1.1.2
•
•
•
•
Software Features
Optimized for low latency interrupt handling
Hub and flash media reader/writer configuration from a single source: External I
2
C ROM or external SPI ROM
EEPROM update via USB
Please see the USB2640/USB2641 Software Release Notes for additional software features
1.2
1.2.1
OEM Selectable Features
Hub
A default configuration is available in USB2640/USB2641 following a reset. The USB2640/USB2641 may also be con-
figured by an external I
2
C EEPROM or via external SPI ROM flash.
The USB2640/USB2641 supports several OEM selectable features:
• Compound Device support (port is permanently hardwired to a downstream USB peripheral device), on a port-by-
port basis.
• Select over-current sensing and port power control on an individual (port-by-port) or ganged (all ports together)
basis to match the OEM’s choice of 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 or non-removable configurations
• Flexible port mapping and disable sequence. Ports can be disabled/reordered in any sequence to support multiple
platforms with a single design. The hub will automatically reorder the remaining ports to match the host controller's
numbering scheme.
• Programmable USB differential-pair pin location.
- Eases PCB layout by aligning USB signal lines directly to connectors
• Programmable USB signal drive strength. Recover USB signal integrity due to compromised system environ-
ments using 4 levels of signal drive strength.
• Indicate the maximum current that the 2-port hub consumes from the USB upstream port.
• Indicate the maximum current required for the hub controller.
1.2.2
•
•
•
•
•
FLASH MEDIA CONTROLLER
Customize vendor ID, product ID, and device ID.
12-hex digit (max) serial number string
Customizable vendor specific data by optional use of external serial EEPROM
28-character manufacturer ID and product string for flash media reader/writer