SST28SF040A(2003) View Datasheet(PDF) - Silicon Storage Technology
Part Name
Description
Manufacturer
SST28SF040A Datasheet PDF : 26 Pages
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Data Sheet
Successive Reads
An Alternative means for determining an end of a Write
operation is by reading the same address for two consecu-
tive data matches.
Product Identification
The Product Identification mode identifies the device
as SST28SF/VF040A and the manufacturer as SST.
This mode may be accessed by hardware and soft-
ware operations. The hardware operation is typically
used by an external programmer to identify the correct
algorithm for the SST28SF/VF040A. Users may wish
4 Mbit SuperFlash EEPROM
SST28SF040A / SST28VF040A
to use the software operation to identify the device
(i.e., using the device ID). For details see Table 3 for
the hardware operation and Figure 19 for the software
operation. The manufacturer’s and device IDs are the
same for both operations.
TABLE 1: PRODUCT IDENTIFICATION
Manufacturer’s ID
Device ID
SST28SF/VF040A
Address
0000H
0001H
Data
BFH
04H
T1.1 310
FUNCTIONAL BLOCK DIAGRAM
X-Decoder
A18 - A0
Address Buffer & Latches
CE#
OE#
WE#
Control Logic
SuperFlash
Memory
Y-Decoder
I/O Buffers and Data Latches
DQ7 - DQ0
310 ILL B1.1
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
4 3 2 1 32 31 30
5
29
6
28
7
27
8
32-lead PLCC 26
9
25
10
Top View
24
11
23
12
22
13
21
14 15 16 17 18 19 20
A14
A13
A8
A9
A11
OE#
A10
CE#
DQ7
FIGURE 1: PIN ASSIGNMENTS FOR 32-LEAD PLCC
310 ILL F02.3
©2003 Silicon Storage Technology, Inc.
4
S71077-05-000 3/03 310
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