1 descriptionhigh speed usb 2.0 memory card reader controller with dedicated 32-bit microprocessor, the cost down version for jy8080.

jy8081 is the cost down version for jy8080the fastest usb 2.0 memory card reader with embedded 32-bit microprocessor. it can attain 30mbyte/s for read and 20mbyte/s for write.

jy8081 supports all available hosts and the pc platforms with both usb 2.0 and 1.1 interfaces. complied with usb 2.0 mass storage specification, jy8081 is fully pnp (plug-and-play) without loading additional driver under windows vista, windows xp, windows 2000, and mac 10.x. with device driver installed, it can support windows 98/98se as well.

jy8081 supports sd 2.0/1.1, mmc 3.x/4.0/4.2 specification.

2 features

usb interface

high-speed usb 2.0 interface; backward compatible with usb 1.1

integrated usb 2.0/usb1.1 phy and controller

fastest data transfer rate on the market

high speed mode: 30mb/s for read, 20mb/s for write

general feature list

internal regulators

internal por

internal power mosfet for controlling card power supply

support multiple disk drives emulation

support passive crystal oscillator

mmc card support feature

support mmc version 4.2/4.0/3.3

support high voltage mode

support high speed mode

support 1/4/8 bit bus mode

support high capacity card up to 32gb

support mmc card hot plug and removal

sd card support feature

supportsdversion 2.0/1.1

support high voltage mode

support 1/4 bit bus mode

support sdhc card up to 32gb

supportsdcard write protection

supportsdcard hot plug and removal

proven 32-bit microprocessor

integrated dual voltage regulators

led indicator to display access status

three modes: busy, waiting, and off

usb suspend and resume

low power dissipation

user friendly windows based gui application for value-added applications production

support value-added memory card applications using jy6080 sd/mmc controller.

cmos 0.16um technology

windows vista/xp/2000/98/me, mac10.x and linux compatible

compares with jy8080, 8081 make the following modifications.

1 jy8081 removes spi / i2c interfaces.

5 pins: e2p_wpn、spi_csn、spi_clk、spi_miso_i、spi_mosi_o are removed on jy8081 chip.

2 pack_sel pin on 4081 is a little difference from jy8080.

for jy8081: when pack_sel=1, do not support 8bit mmc mode;

for jy8080: when pack_sel=0, do not support 8bit mmc mode.

by default, pack_sel pulls up in both 4080 and jy8081 cases.

3 new pin lun_mode pad added.

if high (by default), disk driver emulation enabled once connecting with usb host; else, disk driver emulation enabled only if card insertion happens.

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