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EKF5250
USB full speed NAND flash controller
Preliminary
1. General Description
SPECIFICATION
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
EKF5250
USB full speed NAND flash controller
Preliminary
* Supports saving power mode(SLEEP MODE) * MCU run at 16MHz. * PerformanceGRead(1000K Bytes/s), Write(800K Bytes/s) Max. * PackageGSSOP28
3. Applications
* NAND Flash Controller * Smart Media Controller
This specification may change without further notice.
02, 12, 2003
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EKF5250
USB full speed NAND flash controller
Preliminary
4. Pin Configuration
GND V3.3SW V3.3 NF_D7 NF_D6 NF_D5 NF_D4 NF_D3 NF_D2 NF_D1 NF_D0 NF_WE n NF_ALE NF_CLE
1
2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23
DM DP VBus OS CO OS CI TEST LED WPS NF_RnB NF_REn NF_CEn3 NF_CEn2 NF_CEn1 NF_CEn0
EKF5250
22 21 20 19 18 17 16 15
This specification may change without further notice.
02, 12, 2003
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EKF5250
USB full speed NAND flash controller
Preliminary
5. Pin Description
Name Vbus GND V3.3 DP DM V3.3SW NF_CEn0 NF_CEn1 NF_CEn2 NF_CEn3 NF_D7~0 NF_WEn NF_REn NF_ALE NF_CLE NF_RnB OSCI OSCO LED WPS TEST I/O type Description O I/O I/O O I/O I/O I/O I/O I/O O O O O I I O O I I Power and ground pin Power supply Ground 3.3V output voltage USB analog signal USB plus data line interface USB minus data line interface 1.5Kohm pull high terminal NAND Flash interface signal Chip enable for NAND Flash 0 Chip enable for NAND Flash 1 Chip enable for NAND Flash 2 Chip enable for NAND Flash 3 Data input/output for NAND Flash Write enable for NAND Flash Read enable for NAND Flash Address latch enable for NAND Flash Command latch enable for NAND Flash NAND Flash Ready or Busy MISC Crystal input terminal or external clock input Output terminal for crystal osc. or external clock LED sink pin Write protect switch TEST Pin I/O7 I/O7 I/O7 I/O7 I/O7 O9 O9 O8 O8 I-U5 Note
O10 I-U50 I-L10
This specification may change without further notice.
02, 12, 2003
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EKF5250
USB full speed NAND flash controller
Preliminary
6. Block Diagram
2 MHz Crystal 5V Host
Regulator
USB Core
PLL
3.3V USB I/F
LUT
MCU
DMA(Buf)
ECC
Flash I/F
Flash 0
Flash 1
Flash 2
Flash 3
This specification may change without further notice.
02, 12, 2003
5
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 0 -65 -0.5 -0.5 Max 70 150 6.0 6.0 Unit C C V V
This specification may change without further notice.
02, 12, 2003
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EKF5250
USB full speed NAND flash controller
Preliminary
9. DC Electrical Characteristic(T = 0C ~70C, VD=3.3V, GND=0V) 9.1 I/O7
Symbol
VIH1 VIL1 VOH1 VOL1
Parameter
Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage
Condition
Min Typ Max Unit
2.0 0.8 V V V V
IOH = -7.0mA IOL = 7.0mA
2.4 0.4
9.2 O8
Symbol
VOH2 VOL2
Parameter
Output High Voltage Output Low Voltage
Condition
IOH = -8.0mA IOL = 8.0mA
Min Typ Max Unit
2.4 0.4 V V
9.3 O9
Symbol
VOH3 VOL3
Parameter
Output High Voltage Output Low Voltage
Condition
IOH = -9.0mA IOL = 9.0mA
Min Typ Max Unit
2.4 0.4 V V
9.4 O10
Symbol
VOH4 VOL4
Parameter
Output High Voltage Output Low Voltage
Condition
IOH = -8.0mA IOL = 10.0mA
Min Typ Max Unit
2.4 -10% 1.3 +10% V V
9.5 I-U5
Symbol
VIH5 VIL5 Ru5
Parameter
Input High Voltage Input Low Voltage Pull-high resistor
Condition
Min Typ Max Unit
2.0 -20% 5 V 0.8 V +20% K
This specification may change without further notice.
02, 12, 2003
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EKF5250
USB full speed NAND flash controller
Preliminary
9.6 I-U50
Symbol
VIH6 VIL6 Ru6
Parameter
Input High Voltage Input Low Voltage Pull-high resistor
Condition
Min Typ Max Unit
2.0 -20% 50 V 0.8 V +20% K
9.7 I-L10
Symbol
VIH7 VIL7 Ru7
Parameter
Input High Voltage Input Low Voltage Pull-low resistor
Condition
Min Typ Max Unit
2.0 -20% 10 V 0.8 V +20% K
9.8 MISC
Symbol
Vbus IIL VIHX VILX ISB ICC
Parameter
USB bus power Input Leakage Current Clock Input High Voltage Clock Input Low Voltage Power down current Operating supply current
Condition
VIN = VD OSCI OSCI
Min Typ Max Unit
4.4 2.5 1.0 450 33 5.25 1 V A V V A mA
This specification may change without further notice.
02, 12, 2003
8
EKF5250
USB full speed NAND flash controller
Preliminary
10. Application Circuit
C1 0.1uF J1 4 3 2 1 USB(A Plug) 10uF 0.1uF R1 1.5K 3.3V DP C3 + C4 NF_IO7 NF_IO6 NF_IO5 NF_IO4 NF_IO3 NF_IO2 NF_IO1 NF_IO0 NF_WEn NF_ALE NF_CLE + C2 10uF U1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND V3.3SW V3.3 NF_D7 NF_D6 NF_D5 NF_D4 NF_D3 NF_D2 NF_D1 NF_D0 NF_WEn NF_ALE NF_CLE EKF5250 DM DP VBus OSCO OSCI TEST LED WPS NF_RnB NF_REn NF_CEn3 NF_CEn2 NF_CEn1 NF_CEn0 28 27 26 25 24 23 22 21 20 19 18 17 16 15 DM DP C5 20P C6 20P
2MHz
Q1
DM
D1 NF_RnB NF_REn NF_CEn3 NF_CEn2 NF_CEn1 NF_CEn0
LED S1
3.3V 3.3V
SW SPDT
U2 NF_IO0 NF_IO1 NF_IO2 NF_IO3 NF_IO4 NF_IO5 NF_IO6 NF_IO7 29 30 31 32 41 42 43 44 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC VCC VCC VSS VSS VSS 1 2 4 5 11 14 20 21 23 24 25 26 28 33 35 38 40 45 47 48 37 12 36 13 6 C7 C8 0.1uF 0.1uF NF_IO0 NF_IO1 NF_IO2 NF_IO3 NF_IO4 NF_IO5 NF_IO6 NF_IO7 29 30 31 32 41 42 43 44
U3 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC VCC VCC VSS VSS VSS 1 2 4 5 11 14 20 21 23 24 25 26 28 33 35 38 40 45 47 48 37 12 36 13 6 C9 C10 0.1uF 10uF NF_IO0 NF_IO1 NF_IO2 NF_IO3 NF_IO4 NF_IO5 NF_IO6 NF_IO7 29 30 31 32 41 42 43 44
U4 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC VCC VCC VSS VSS VSS 1 2 4 5 11 14 20 21 23 24 25 26 28 33 35 38 40 45 47 48 37 12 36 13 6 C11 C12 0.1uF 10uF NF_IO0 NF_IO1 NF_IO2 NF_IO3 NF_IO4 NF_IO5 NF_IO6 NF_IO7 29 30 31 32 41 42 43 44
U5 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC VCC VCC VSS VSS VSS 1 2 4 5 11 14 20 21 23 24 25 26 28 33 35 38 40 45 47 48 37 12 36 13 6 C13 C14 0.1uF 10uF
NF_RnB NF_REn NF_CEn0 NF_CLE NF_ALE NF_WEn 3.3V
7 8 9 16 17 18 19
R/B RE CE CLE ALE WE WP
NF_RnB NF_REn NF_CEn1 NF_CLE NF_ALE NF_WEn 3.3V
7 8 9 16 17 18 19
R/B RE CE CLE ALE WE WP
NF_RnB NF_REn NF_CEn2 NF_CLE NF_ALE NF_WEn 3.3V
7 8 9 16 17 18 19
R/B RE CE CLE ALE WE WP
NF_RnB NF_REn NF_CEn3 NF_CLE NF_ALE NF_WEn 3.3V
7 8 9 16 17 18 19
R/B RE CE CLE ALE WE WP
3 10 15 22 27 34 39 46
NC NC NC NC NC NC NC NC Flash
3.3V
3 10 15 22 27 34 39 46
NC NC NC NC NC NC NC NC Flash
3.3V
3 10 15 22 27 34 39 46
NC NC NC NC NC NC NC NC Flash
3.3V
3 10 15 22 27 34 39 46
NC NC NC NC NC NC NC NC Flash
3.3V
This specification may change without further notice.
02, 12, 2003
9
EKF5250
USB full speed NAND flash controller
Preliminary
11. Package
Unit : mm
This specification may change without further notice.
02, 12, 2003
10
EKF5250
USB full speed NAND flash controller
Preliminary
(c) 2002 ELAN Microelectronics Corporation All Rights Reserved
Printed in Taiwan, ROC, 05/2002
The contents of this specification are subject to change without notice. ELAN Microelectronics assumes no responsibility for errors that may appear in this specification. ELAN Microelectronics makes no commitment to update, or to keep current, the information contained in this specification. The products described herein are not intended for use in life support appliances, devices, or systems. Use of ELAN Microelectronics products in such applications are not supported and is prohibited. NO PART OF THIS SPECIFICATION MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS WITHOUT THE EXPRESS WRITTEN PERMISSION OF ELAN MICROELECTRONICS.
ELAN
MICROELECTRONICS
CORPORATION
Headquarters:
No. 12, Innovation Road 1, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: +886 3 5639977 Fax: +886 3 5639966 http://www.emc.com.tw
Hong Kong Office:
Rm. 1005B, 10/F Empire Centre 68 Mody Road, Tsimshatsui Kowloon , HONG KONG Tel: +852 2838-8715 Fax: +852 2838-0497
This specification may change without further notice.
02, 12, 2003
11

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