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SST36VF1602-90-4E-BK 데이터시트(PDF) 4 Page - Silicon Storage Technology, Inc |
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SST36VF1602-90-4E-BK 데이터시트(HTML) 4 Page - Silicon Storage Technology, Inc |
4 / 26 page 4 © 2000 Silicon Storage Technology, Inc. 16 Megabit Concurrent SuperFlash SST36VF1601 / SST36VF1602 Advance Information S71142 373-3 11/00 Software Data Protection (SDP) The SST36VF1601/1602 provide the JEDEC standard Software Data Protection scheme for all data alteration operations, i.e., Program and Erase. Any Program opera- tion requires the inclusion of the three-byte sequence. The three-byte load sequence is used to initiate the Program operation, providing optimal protection from inadvertent Write operations, e.g., during the system power-up or power-down. Any Erase operation requires the inclusion of six-byte sequence. The SST36VF1601/ 1602 are shipped with the Software Data Protection permanently enabled. See Table 4 for the specific soft- ware command codes. During SDP command sequence, invalid commands will abort the device to Read mode within TRC. The contents of DQ15-DQ8 are “Don’t Care” during any SDP command sequence. Common Flash Memory Interface (CFI) The SST36VF1601/1602 also contain the CFI informa- tion to describe the characteristics of the device. In order to enter the CFI Query mode, the system must write three-byte sequence, same as Software ID Entry com- mand with 98H (CFI Query command) to address 555H in the last byte sequence. Once the device enters the CFI Query mode, the system can read CFI data at the addresses given in Tables 5 through 7. The system must write the CFI Exit command to return to Read mode from the CFI Query mode. Product Identification The Product Identification mode identifies the devices and manufacturer. For details, see Table 4 for software operation, Figure 13 for the Software ID Entry and Read timing diagram and Figure 21 for the Software ID Entry command sequence flowchart. TABLE 1: PRODUCT IDENTIFICATION WORD DATA Manufacturers ID 0000 H 00BF H Device ID SST36VF1601 0001 H 2761 H Device ID SST36VF1602 0001 H 2762 H Product Identification Mode Exit/CFI Mode Exit In order to return to the standard Read mode, the Software Product Identification mode must be exited. Exit is accomplished by issuing the Software ID Exit command sequence, which returns the device to the Read mode. This command may also be used to reset the device to the Read mode after any inadvertent transient condition that apparently causes the device to behave abnormally, e.g., not read correctly. Please note that the Software ID Exit/CFI Exit command is ignored during an internal Program or Erase operation. See Table 4 for software command codes, Figure 15 for timing waveform and Figure 21 for a flowchart. FUNCTIONAL BLOCK DIAGRAM 373 PGM T1.0 373 ILL B37.4 SuperFlash Memory 12 Mbit Bank I/O Buffers SuperFlash Memory 4 Mbit Bank Memory Address DQ15 - DQ0 CE# WP# WE# OE# Control Logic RESET# RY/BY# Address Buffers (4 KWord Sector Protection) |
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