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SST36VF1601-70-4C-BK 데이터시트(PDF) 4 Page - Silicon Storage Technology, Inc |
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SST36VF1601-70-4C-BK 데이터시트(HTML) 4 Page - Silicon Storage Technology, Inc |
4 / 26 page 4 Data Sheet 16 Mbit Concurrent SuperFlash SST36VF1601 ©2001 Silicon Storage Technology, Inc. S71142-06-000 11/01 373 Hardware Reset (RST#) The RST# pin provides a hardware method of resetting the device to read array data. When the RST# pin is held low for at least TRP, any in-progress operation will terminate and return to Read mode (see Figure 16). When no internal Program/Erase operation is in progress, a minimum period of TRHR is required after RST# is driven high before a valid Read can take place (see Figure 15). The Erase operation that has been interrupted needs to be reinitiated after the device resumes normal operation mode to ensure data integrity. Software Data Protection (SDP) The SST36VF1601 provides the JEDEC standard Soft- ware Data Protection scheme for all data alteration opera- tions, i.e., Program and Erase. Any Program operation 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 is shipped with the Software Data Protection permanently enabled. See Table 4 for the specific software command codes. During SDP command sequence, invalid commands will abort the device to Read mode within TRC. The contents of DQ15- DQ8 can be VIL or VIH, but no other value during any SDP command sequence. Common Flash Memory Interface (CFI) The SST36VF1601 also contains the CFI information 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 command with 98H (CFI Query command) to address 5555H 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 device and manufacturer. For details, see Table 4 for software opera- tion, Figure 12 for the Software ID Entry and Read timing diagram and Figure 21 for the Software ID Entry command sequence flowchart. Product Identification Mode Exit/CFI Mode Exit In order to return to the standard Read mode, the Soft- ware 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 the software command code, Figure 14 for timing waveform and Figure 21 for a flowchart. TABLE 1: PRODUCT IDENTIFICATION Word Data Manufacturer’s ID 0000H 00BFH Device ID SST36VF1601 0001H 2761H T1.1 373 |
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