SST29SF040 datasheet(4/25 Pages) SST

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Data Sheet

2 Mbit / 4 Mbit Small-Sector Flash

SST29SF020 / SST29SF040

SST29VF020 / SST29VF040

S71160-13-000

10/06

Product Identification

The Product Identification mode identifies the devices as

SST29SF020,

SST29SF040

and

SST29VF020,

SST29VF040 and manufacturer as SST. This mode may

be accessed by software operations. Users may use the

Software Product Identification operation to identify the part

(i.e., using the device ID) when using multiple manufactur-

ers in the same socket. For details, see Table 4 for software

operation, Figure 11 for the Software ID Entry and Read

timing diagram, and Figure 18 for the Software ID Entry

command sequence flowchart.

Product Identification Mode Exit/Reset

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 operation.

Please note that the Software ID Exit command is ignored

during an internal Program or Erase operation. See Table 4

for software command codes, Figure 12 for timing wave-

form, and Figure 18 for a flowchart.

FIGURE 1: Functional Block Diagram

TABLE

1: Product Identification

Address

Data

Manufacturer’s ID

0000H

BFH

Device ID

SST29SF020

0001H

24H

SST29VF020

0001H

25H

SST29SF040

0001H

13H

SST29VF040

0001H

14H

T1.3 1160

Y-Decoder

I/O Buffers and Data Latches

1160 B1.0

Address Buffers & Latches

X-Decoder

DQ7 - DQ0

Memory

Address

OE#

CE#

WE#

SuperFlash

Memory

Control Logic

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