參數(shù)資料
型號(hào)： CY7C68301C
廠商： Cypress Semiconductor Corp.
英文描述： EZ-USB AT2LP USB 2.0 to ATA/ATAPI Bridge(EZ-USB AT2LP USB 2.0到ATA/ATAPI橋接器)
中文描述： 的EZ - USB AT2LP產(chǎn)品的USB 2.0的ATA / ATAPI橋（的EZ - USB AT2LP產(chǎn)品的USB 2.0到ATA / ATAPI接口橋接器）
文件頁(yè)數(shù)： 2/42頁(yè)
文件大小： 761K
代理商： CY7C68301C
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Document 001-05809 Rev. *A
Page 2 of 42
Applications
The CY7C68300C/301C and CY7C68320C/321A implement
a USB 2.0 bridge for all ATA/ATAPI-6 compliant mass storage
devices, such as the following:
Hard drives
CD-ROM, CD-R/W
DVD-ROM, DVD-RAM, DVD±R/W
MP3 players
Personal media players
CompactFlash
Microdrives
Tape drives
Personal video recorders
The CY7C68300C/301C and CY7C68320C/321A support one
or two devices in the following configurations:
ATA/ATAPI master only
ATA/ATAPI slave only
ATA/ATAPI master and ATA/ATAPI slave
CompactFlash only
ATA/ATAPI slave and CompactFlash or other removable
IDE master
Additional Resources
CY4615C EZ-USB AT2LP Reference Design Kit
USB Specification
version 2.0
ATA Specification
T13/1410D Rev 3B
USB
Mass Storage Class Bulk Only Transport
Specification
,
www.usb.org
Introduction
The EZ-USB AT2LP
(CY7C68300C/CY7C68301C and
CY7C68320C/CY7C68321C) implements a fixed-function
bridge between one USB port and one or two ATA- or
ATAPI-based mass storage device ports. This bridge adheres
to the
Mass Storage Class Bulk-Only Transport
Specification
(BOT) and is intended for bus- and self-powered devices.
The AT2LP is the latest addition to the Cypress USB mass
storage portfolio, and is an ideal cost- and power-reduction
path for designs that previously used Cypress’s ISD-300A1,
ISD-300LP, or EZ-USB AT2.
Specifically, the CY7C68300C/CY7C68301C includes a
mode that makes it pin-for-pin compatible with the
EZ-USB AT2 (CY7C68300A)
.
The
USB
port
of
the
CY7C68320C/321A (AT2LP) are connected to a host
computer directly or with the downstream port of a USB hub.
Software on the USB host system issues commands and
sends data to the AT2LP and receives status and data from
the AT2LP using standard USB protocol.
The ATA/ATAPI port of the AT2LP is connected to one or two
mass storage devices. A 4 KB buffer maximizes ATA/ATAPI
CY7C68300C/301C
and
data transfer rates by minimizing losses due to device seek
times. The ATA interface supports ATA PIO modes 0, 3, and 4,
multiword DMA mode 2, and Ultra DMA modes 2, 3, and 4.
The device initialization process is configurable, enabling the
AT2LP to initialize ATA/ATAPI devices without software inter-
vention.
CY7C68300A Compatibility
As mentioned above, the CY7C68300C/301C contains a
backward compatibility mode that allows it to be used in
existing EZ-USB AT2 (CY7C68300A) designs. The backward
compatibility mode is enabled by programming the EEPROM
with the CY7C68300A signature.
During startup, the AT2LP checks the I
2
C bus for an
EEPROM with a valid signature in the first two bytes. If the
signature is 0x4D4D, the AT2LP configures itself for pin-to-pin
compatibility with the AT2 and begins normal mass storage
operation. If the signature is 0x534B, the AT2LP configures
itself with the AT2LP pinout and begins normal mass storage
operation.
Refer to the logic flow in
Figure 1
for more information on the
pinout selection process.
Most designs that use the AT2 can migrate to the AT2LP with
no changes to either the board layout or EEPROM data.
Cypress has published an application note focused on
migrating from the AT2 to the AT2LP to help expedite the
process. It can be downloaded from the Cypress website
http://www.cypress.com
Figure 1. Simplified Pinout Selection Flowchart
相關(guān)PDF資料
PDF描述
CY7C68300C EZ-USB AT2LP USB 2.0 to ATA/ATAPI Bridge(EZ-USB AT2LP USB 2.0到ATA/ATAPI橋接器)
CY7C68321C EZ-USB AT2LP USB 2.0 to ATA/ATAPI Bridge(EZ-USB AT2LP USB 2.0到ATA/ATAPI橋接器)
CY8C20434 PSoC Mixed-Signal Array(PSoC混合信號(hào)陣列)
CY8C20234 PSoC Mixed-Signal Array(PSoC混合信號(hào)陣列)
CY8C20334 PSoC Mixed-Signal Array(PSoC混合信號(hào)陣列)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY7C68301C-56LFXC 功能描述:USB 接口集成電路 USB Hi Spd Peripherals RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
CY7C68301C-56LTXC 功能描述:USB 接口集成電路 AT2LP HS-USB RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
CY7C68301C-56PVXC 功能描述:USB 接口集成電路 USB Hi Spd Peripherals RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
CY7C68310-80AC 制造商:Cypress Semiconductor 功能描述:
CY7C68310-80AXC 制造商:Rochester Electronics LLC 功能描述: 制造商:Cypress Semiconductor 功能描述:
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