Transcend Information TS4/8GUSDHC6-P3 manual Taac, Nsac, Transpeed

Page 15

TS4/8GUSDHC6-P3	4/8GB microSDHC Class 6 Card + Reader P3

CSD Register Structure

•TAAC

This field is fixed to 0Eh, which indicates 1 ms. The host should not use TAAC, NSAC, and R2W_FACTOR to calculate timeout and should uses fixed timeout values for read and write operations (See 4.6.2).

•NSAC

This field is fixed to 00h. NSAC should not be used to calculate time-out values.

•TRAN_SPEED

The following table defines the maximum data transfer rate per one data line - TRAN_SPEED:

Transcend Information Inc.

15

Image 15

Contents Pin Definition Description FeaturesPlacement 8GB microSDHC Class 6 Card + Reader P3Architecture Current Consumption Power Supply VoltageBus Signal Line Load Bus Operating Conditions GeneralSingle card capacitance Parameter Symbol Min Max Unit Remark Bus Signal LevelsBus Timing Output Delay time during Data Transfer Mode Bus Timing High Speed Mode Output Hold time Reliability and Durability OCR register Register InformationPRV MIDOID PNMPSN MDTCRC CSD Register Fields CSD Version CsdstructureTaac NsacTranspeed Writeblkmisalign CCCReadbllen ReadblpartialSectorsize WpgrpenableCsize EraseblkenFileformat CopyPermwriteprotect TmpwriteprotectRCA Register Scrstructure SdspecDatastataftererase Sdbuswidths SdsecurityMechanical Description Top View Mechanical Description Bottom View Mechanical Description Keep Out Area MicroSD package Dimensions Placement Dimensions DescriptionSystem Requirements Block Diagram USB PinoutsUSB Pin Identification Parameter MIN DC CharacteristicsDC Electrical Characteristics of 3.3V I/O Recommended Operating Conditions