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EKF5250 の電気的特性と機能

EKF5250のメーカーはELAN Microelectronicsです、この部品の機能は「USB full speed NAND flash controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 EKF5250
部品説明 USB full speed NAND flash controller
メーカ ELAN Microelectronics
ロゴ ELAN Microelectronics ロゴ 




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EKF5250 Datasheet, EKF5250 PDF,ピン配置, 機能
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eKF5250
USB full speed NAND flash controller
Preliminary
SPECIFICATION
1. General Description
The eKF5250 provides a high-performance interface to bridge USB and NAND Flash
compliance device which can be used to implement of flash memory storage device with USB
interface. It contains a 8-bit RISC processor to greatly reduce firmware development work.
The eKF5250 has a phase Lock Loop(PLL) embedded. The PLL provided all clocks needed
in this Controller. It needs an externally provided clock operating in 2 Mhz.
The eKF5250 can control up to 4 pieces of NAND Flash memory. The flash capacity can be
16M bytes up to 256M bytes. And these chips can be any combination. It has been optimized to
support Toshiba and Samsung flash memory designs. The controller has write-protected ability
to prevent writing data to flash. For read/write operation, the controller can achieve 1000KB
/800KB throughput.
This controller can operate in Win XP, Win2000, Windows ME without any driver
installation.
2. Features
USB Specification v1.1 Compliant
USB Mass Storage Class v1.0 Compliant
Support 12 Mbits/s Full Speed Serial Data Transmission
Support USB Mass Storage Class Bulk-Only Spec.
USB bus-powered capability
Build in PLL used to generate clock for USB. And MCU.
Total 3 Endpoints. Endpoint 0 is the default control endpoint. Endpoint 1 is the
Bulk-in endpoint. Endpoint 2 is the Bulk-out endpoint.
4K x 13 on chip ROM(Program).
Support wear leveling
Support write-protected ability.
Higher reliability : ECC on the fly
Support ping-pong buffer(Two 536x8 bits) for data transfer to/from NAND Flash
Support 4 pieces of NAND Flash.memory
8 Level stack for subroutine nesting.
1 LED sink pin with internal serial resistor.
One 8 bits general purpose timer.
Watchdog Timer with its own on-chip RC oscillator
This specification may change without further notice.
02, 12, 2003
1

1 Page





EKF5250 pdf, ピン配列
4. Pin Configuration
eKF5250
USB full speed NAND flash controller
Preliminary
eKF5250
This specification may change without further notice.
02, 12, 2003
3


3Pages


EKF5250 電子部品, 半導体
eKF5250
USB full speed NAND flash controller
Preliminary
7. Function Description
To help the system manufactures to build high quality, low cost USB storage
systems, several special feature which described as below are implement. The
eKF5250 support the down-grade/untested NAND Flash. By testing the target NAND
flash, if bad block is found, the controller will mark this bad block and will not use
this block hereafter. Therefore, the integrated test software including format program
will be support.
To reduce cost and increase performance and reliability, the eKF5250 build-in
SRAM (Look-Up-Table) to support logical-to physical address translation. The eKF5250
also build-in ECC function, the real time ECC correction keeps the data integrity while
still maintains the high data transfer rate.
Regarding flash, erase/program operation by the high voltage can cause oxide
degradation and failure if it is repeated without limit. The wear-level algorithm is
implement in the firmware. Update data of a block into a physically different with new
link list also help alleviates repetitive cycling.
The 5 volts to 3.3 volts regulator is build-in, so no regulator needed externally.
The BOM will be reduced.
No driver needed under Microsoft Windows ME/2000/XP, driver will be supported
for Windows 98.
8. Absolute Maximum Ratings
Symbol
Temperature under bias
Storage temperature
Input voltage
Output voltage
Min Max Unit
0 70
-65 150
-0.5 6.0
-0.5 6.0
ºC
ºC
V
V
This specification may change without further notice.
02, 12, 2003
6

6 Page



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部品番号部品説明メーカ
EKF5250

USB full speed NAND flash controller

ELAN Microelectronics
ELAN Microelectronics


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