AK6487 ALCOR USB2.0 Single-LUN Flash Card Reader Controller
1.
Description
The AK6487 is a single chip integrated USB 2.0 multimedia card
reader controller that
enables PC/DVD/Printer to read/write various types of flash media
cards. Flash media
cards such as SD are widely used in digital camera, cell phone, PDA
and MP3 player
to store digital photos and compressed music.
Performance of AK6487 is maximized by implementing the latest and
fastest card
specification available form the industry.
Especially, AK6487 is designed with the high performance
characteristic in flash card
I/O speed. Users can easy and fast transfer the digital content
among the different
flash card
2.Features
Compatible USB V2.0 High Speed and Full Speed specification
LUN1: SD/MMC
3.Memory Card Type Support
Support SD spec up to ver. 4.00 (Compatible)
Support SD3.0 SDR-104, SDR-50 and DDR 50.
Support high capacity up to 2TB
Compatible MMC spec v4.4
4.
Others
Hardware DMA engine integrated for performance enhancement.
Ping-pong FIFO implementation for concurrent bus operation
Support multiple sectors transfer optimize performance
Support Dynamic Icon Utility
Support Role Switch Function
Support ISP (In System Programming) for firmware upgrade from the
external
SPI Flash via USB port
5.
Support LED for bus operating indication. Blinking rate is 1Hz and
50% duty
cycle
Power switch integrated to reduce production BOM cost
Integrated high speed 8051 CPU
Built in 5V to 3.3V and 3.3V to 1.8V regulator.
Built in resonator and both support external 12MHz crystal clock
source input.
Available in 48-pin QFN package
6.Application Block Diagram
Following application diagram demonstrates a typical card reader
using the AK6487
chip. By connecting the card reader to a desktop or notebook PC
through USB bus,
the AK6487 becomes a bus-powered, high speed USB card reader, which
can be
used as a bridge for data transfer between Desktop PC and Notebook
PC
7.Pin Assignment
