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SST36VF3203 Datasheet(PDF) 6 Page - Silicon Storage Technology, Inc |
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SST36VF3203 Datasheet(HTML) 6 Page - Silicon Storage Technology, Inc |
6 / 34 page 6 Data Sheet 32 Mbit Concurrent SuperFlash SST36VF3203 / SST36VF3204 ©2005 Silicon Storage Technology, Inc. S71270-03-000 7/06 Security ID The SST36VF320x devices offer a 136-word Security ID space. The Secure ID space is divided into two seg- ments—one 128-bit factory programmed segment and one 128-word (256-byte) user-programmed segment. The first segment is programmed and locked at SST with a unique, 128-bit number. The user segment is left un-programmed for the customer to program as desired. To program the user segment of the Security ID, the user must use the Security ID Program command. End-of-Write status is checked by reading the toggle bits. Data# Polling is not used for Security ID End-of-Write detection. Once pro- gramming is complete, the Sec ID should be locked using the User Sec ID Program Lock-Out. This disables any future corruption of this space. Note that regardless of whether or not the Sec ID is locked, neither Sec ID seg- ment can be erased. The Secure ID space can be queried by executing a three-byte command sequence with Query Sec ID command (88H) at address 555H in the last byte sequence. See Figure 14 for timing diagram. To exit this mode, the Exit Sec ID command should be executed. Refer to Table 7 for more details. Product Identification The Product Identification mode identifies the devices and manufacturer. For details, see Table 2 for software opera- tion, Figure 11 for the Software ID Entry and Read timing diagram and Figure 21 for the Software ID Entry command sequence flowchart. The addresses A20 and A18 indicate a bank address. When the addressed bank is switched to Product Identification mode, it is possible to read another address from the same bank without issuing a new Soft- ware ID Entry command. The Software ID Entry command may be written to an address within a bank that is in Read Mode or in Erase-Suspend mode. The Software ID Entry command may not be written while the device is program- ming or erasing in the other bank. Note: BKX = Bank Address (A20-A18) 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 accom- plished 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 appar- ently 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 7 for the software command code, Fig- ure 13 for timing waveform and Figure 21 for a flowchart. TABLE 2: PRODUCT IDENTIFICATION Address Data Manufacturer’s ID BKX0000H 00BFH Device ID SST36VF3203 BKX0001H 7354H SST36VF3204 BKX0001H 7353H T2.1 1270 1270 B01.0 SuperFlash Memory Bank 1 I/O Buffers SuperFlash Memory Bank 2 Memory Address DQ15/A-1 - DQ0 CE# WP# WE# OE# Control Logic RST# BYTE# RY/BY# Address Buffers (8 KWord / 16 KByte Sector Protection) FUNCTIONAL BLOCK DIAGRAM |
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