SST36VF1601(2001) Ver la hoja de datos (PDF) - Silicon Storage Technology

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SST36VF1601
(Rev.:2001)

16 Mbit Concurrent SuperFlash

Silicon Storage Technology 

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

16 Mbit Concurrent SuperFlash

SST36VF1601

Data Sheet

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.

TABLE 1: PRODUCT IDENTIFICATION

Manufacturer’s ID

Device ID

SST36VF1601

Word

0000H

0001H

Data

00BFH

2761H

T1.1 373

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.

©2001 Silicon Storage Technology, Inc.

4

S71142-06-000 11/01 373

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