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SST85LD0512-120-C-LBZE Datasheet(PDF) 11 Page - Silicon Storage Technology, Inc |
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SST85LD0512-120-C-LBZE Datasheet(HTML) 11 Page - Silicon Storage Technology, Inc |
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11 / 73 page  Advance Information NANDrive SST85LD0128 / SST85LD0256 / SST85LD0512 ©2007 Silicon Storage Technology, Inc. S71319-03-000 2/07 11 4.0 CAPACITY SPECIFICATION Table 4-1 shows the default capacity and specific settings for heads, sectors, and cylinders. The capacities listed apply to either a single device or an externally expanded NANDrive. Users can change the default settings in the drive ID table (see Table 12-4) for customization. If the total number of bytes is less than the default, the remaining space could be used as spares to increase the flash drive endurance. It should also be noted that if the total flash drive capacity exceeds the total default number of bytes, the flash drive endurance will be reduced. 5.0 EXTERNAL CLOCK INTERFACE The external clock interface allows NANDrive operation from an external clock source generated by an RC circuit. Do not use a free running clock as input to the EXTCLKIN pin; an RC circuit must be used. Contact SST for reference circuit and recommended external clock settings. While the device has an internal clock source, the external clock source allows slowing of the system clock operation to limit the peak current and overcome additional bus loading. The external clock interface consists of three signals: INTCLKEN, EXTCLKIN, and EXTCLKOUT. The INTCLKEN pin selects between external and internal clock sources for the NANDrive. If this pin is pulled high before device Power-on, then the internal clock source is selected; otherwise, the external clock source is selected. The EXTCLKIN and EXTCLKOUT signals are the input and output clock signals, respectively. 6.0 SECURITY FEATURES The SST85LD0128 / SST85LD0256 / SST85LD0512 NANDrive devices offer added data protection for applications where data security is of the utmost importance. The secure features are: 1. Protection zones - Customer can enable up to 4 independent protection zones, with two options: Read-only or Hidden (Read and Write protected) within each protected zone. If protection zones are not enabled the data is unprotected (default configura- tion). 2. Password protection - Accessing information within the protected zones can be only achieved through a customer-unique password. 3. Purge command - The system can issue a Purge command to erase all information stored in the flash media. Contact SST for detailed specifications. TABLE 4-1: Default NANDrive Settings Capacity Total Bytes Cylinders Heads Sectors Max LBA 128 MB 128,057,344 977 8 32 250,112 256 MB 256,901,120 980 16 32 501,760 512 MB 512,483,328 993 16 63 1,000,944 T4-1.6 1319 TABLE 4-2: Sustained Performance Product Write Performance Read Performance SST85LD0128 Up to 5 MB/sec without extended NAND Flash Up to 10 MB/sec with extended NAND Flash Up to 10 MB/sec SST85LD0256 Up to 5 MB/sec without extended NAND Flash Up to 10 MB/sec with extended NAND Flash Up to 10 MB/sec SST85LD0512 Up to 8 MB/sec without extended NAND Flash Up to 10 MB/sec with extended NAND Flash Up to 10 MB/sec T4-2.1319 |
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