Samsung R21 Manuel d'utilisateur

Not For New DesignThis is information on a product still in production but not recommended for new designs.February 2009 Rev 6 1/341ST72681USB 2.0 h

NAND Flash interface ST7268110/34 4 NAND Flash interface4.1 NAND Flash support table Table 6. Known NAND Flash compatibility guide for R2

ST72681 NAND Flash interface 11/344.2 NAND error correctionNo NAND Flash memory arrays are guaranteed by manufacturers to be error-free. Error occurr

NAND Flash interface ST7268112/34 4.3.2 Bad block replacementThe firmware works with groups of 1024 blocks, called zones. A complete NAND Flash con

ST72681 NAND Flash interface 13/34Using this scheme, a logical address range doesn’t correspond to a constant block. A write command repeated several

Mass storage implementation ST7268114/34 5 Mass storage implementation5.1 USB characteristicsThe ST72681 is compliant with USB 2.0 specification.It

ST72681 Mass storage implementation 15/345.3.1 Public driveThe public drive is the default configuration in a mono-LUN mode. In this default case, it

Human interface implementation ST7268116/34 6 Human interface implementation6.1 LED behaviorThe application is designed to manage 2 LEDs. This beha

ST72681 Electrical characteristics 17/347 Electrical characteristics7.1 Parameter conditionsUnless otherwise specified, all voltages are referred to V

Electrical characteristics ST7268118/34 7.1.5 Pin input voltageThe input voltage measurement on a pin of the device is described in Figure 5.Figure

ST72681 Electrical characteristics 19/347.2.2 Current characteristics 7.2.3 Thermal characteristics 7.3 Operating conditions7.3.1

Contents ST726812/34 Contents1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Pin

Electrical characteristics ST7268120/34 Figure 6. Guaranteed functionality range7.4 Supply current characteristics7.4.1 RUN and SUSPEND modes

ST72681 Electrical characteristics 21/347.5.2 Crystal oscillatorThe ST72681 internal clock is supplied from a crystal oscillator. All the information

Electrical characteristics ST7268122/34 7.6 EMC characteristicsSusceptibility tests are performed on a sample basis during product characterization.

ST72681 Electrical characteristics 23/347.6.2 Electromagnetic interference (EMI)Based on a simple application running on the product (toggling 2 LEDs

Electrical characteristics ST7268124/34 7.7 I/O port pin characteristics7.7.1 General characteristicsSubject to general operating conditions for VD

ST72681 Electrical characteristics 25/34Figure 10. Two typical Applications with unused I/O Pin7.7.2 Output driving current Subject to general operat

Electrical characteristics ST7268126/34 Figure 12. Typical VOL at VDD33 = 3.3 V (I/O D4) Figure 13. Typical VOL at VDD33 = 3.3 V (I/O D8) Figure 14.

ST72681 Electrical characteristics 27/34Figure 16. Typical VDD33-VOH vs. VDD33 (I/O D8) 7.8 Control pin characteristics7.8.1 Asynchronous RESET pinTA

Electrical characteristics ST7268128/34 Figure 17. Typical RON on RESET pin7.9 Other communication interface characteristics7.9.1 MSCI parallel int

ST72681 Electrical characteristics 29/34 7.9.2 Universal serial bus interface (USB) Table 23. MSCI Parallel Interface: DC

ST72681 Contents 3/347.1 Parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177.1.1 Minimum and ma

Electrical characteristics ST7268130/34 Figure 20. USB signal eye diagramTable 26. USB High Speed Transmit Waveform requirements Voltage L

ST72681 Package mechanical data 31/348 Package mechanical dataIn order to meet environmental requirements, ST offers this device in different grades

Device ordering information ST7268132/34 9 Device ordering information Table 28. Feature comparison tableFeatures added in the S

ST72681 Revision history 33/3410 Revision history Table 30. Document revision history Date Revision Changes27-May-2005 1.0Changed status of t

ST7268134/34 Please Read Carefully:Information in this document is provided solely in connection with ST products. STMicroelectronics

Introduction ST726814/34 1 IntroductionThe ST72681 is a USB 2.0 high-speed Flash drive controller. The USB 2.0 high-speed interface including PHY an

ST72681 Pin description 5/342 Pin descriptionFigure 2 shows the LQFP48 package pinout, while Tabl e 2, Ta ble 3 , Ta ble 4 , and Ta bl e 5 give th

Pin description ST726816/34 Table 2. Power supply Pin Pin name Type Description48 VSS_1 S Ground 47 VDD33_1 S I/Os and

ST72681 Pin description 7/34 Table 5. General purpose I/O ports /mass storage I/Os Pin Pin name TypeLevelMain function(after reset)Input Outp

Application schematics ST726818/34 3 Application schematicsFigure 3. Application schematicST72681/R20 only supports single NAND Flash Chip Enable co

ST72681 Application schematics 9/34ST72681/R21 can support up to four NAND Flash Chip Enable signals. The application can use one of the following con