USB2640i/USB2641i
Industrial Temperature USB 2.0 Flash Media Controller and
USB Hub Combo
General Description
Features
The Microchip USB2640i/USB2641i is a USB 2.0 com-
pliant, Hi-Speed hub for USB port expansion with an
attached mass storage class peripheral controller. The
controller allows read/write capability to popular flash
media from the following families:
• Secure DigitalTM (SD)
• MultiMediaCardTM (MMC)
• xD-Picture CardTM (xD)1
• Memory Stick(MS)
• Compliant with the following flash media card
specifications: SD 2.0 / MMC 4.2 / MS 1.43 / MS-
Pro 1.02 / MS-PRO-HG 1.01 / MS-Duo 1.10 / xD
1.2
• Supports a single external 3.3 V supply source;
internal regulators provide 1.8 V internal core volt-
age for additional bill of materials and power sav-
ings
• The transaction translator (TT) in the hub sup-
ports operation of Full-Speed and Low-Speed
peripherals
The USB2640i/USB2641i is a fully integrated, single
chip solution providing USB expansion and integrated
flash card media reader/writer capability of ultra high
performance operation. Average sustained transfer
rates exceeding 35 MB/s are possible2.
• 9 K RAM | 64 K on-chip ROM
• Enhanced EMI rejection and ESD protection per-
formance
• On board 24 MHz crystal driver circuit
• Optional external 24 MHz clock input
• 8051 8-bit microprocessor
Highlights
• Hub controller with internally connected ultra fast
flash media reader/writer and 2 exposed down-
stream ports for external peripheral expansion
• Hub and flash media reader/writer configuration
from a single source: External I2C ROM or exter-
nal SPI ROM
• Flash media reader/writer employs multiplexed
card interfaces which are optimized for use with
single card insertion combo sockets
- Configures internal code using an external
I2C EEPROM
- Supports external code using a SPI Flash
EEPROM
• Hardware-controlled data flow architecture for all
self-mapped media
- Customizable vendor ID, product ID, lan-
guage ID
• Optional support for external firmware access via
SPI interface
• EEPROM update via USB
• PortMap
• 48-pin QFN RoHS compliant package (7 x 7 mm)
- Flexible port mapping and port disable
sequencing supports multiple platform
designs
• The Microchip USB2640i/USB2641i supports the
industrial temperature range of -40°C to 85°C
• PortSwap
Applications
- Programmable USB differential-pair pin loca-
tions eases PCB design by aligning USB sig-
nal traces directly to connectors
• Desktop and mobile PCs
• Personal mobile devices
• Printers
• PHYBoost
- Programmable USB transceiver drive
strength recovers signal integrity
• GPS navigation systems
• Media Players/Viewers
• Consumer A/V
• Set-top boxes
• Industrial products
1. Support and capabilities for xD-Picture Card are
not applicable for the USB2641I. Please obtain a
user license from the xD-Picture Card License Of-
fice to support this flash media format.
2. Host and media dependent.
2015-2021 Microchip Technology Inc.
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