4 Mbit SuperFlash EEPROM
SST28SF040A / SST28VF040A
Data Sheet
TABLE 3: OPERATION MODES SELECTION
Mode
CE#
VIL
VIL
VIL
VIH
X
OE#
VIL
VIH
VIH
X1
WE# DQ
Address
Read
VIH
VIL
VIL
X
DOUT
AIN
Byte-Program
Sector-Erase
Standby
DIN
AIN, See Table 4
DIN
AIN, See Table 4
High Z
High Z/ DOUT
High Z/ DOUT
DIN
X
Write Inhibit
VIL
X
X
X
X
VIH
VIL
X
Software Chip-Erase
Product Identification
Hardware Mode
VIL
VIH
See Table 4
VIL
VIL
VIH
Manufacturer’s ID (BFH)
A18-A1=VIL, A9=VH, A0=VIL
A18-A1=VIL, A9=VH, A0=VIH
Device ID (04H)
Software Mode
SDP Enable & Disable Mode
Reset
VIL
VIL
VIL
VIL
VIL
VIH
VIH
VIH
VIL
See Table 4
See Table 4
See Table 4
T3.4 310
1. X can be VIL or VIH, but no other value.
TABLE 4: SOFTWARE COMMAND SUMMARY
Required
Setup Command Cycle
Execute Command Cycle
Type1 Addr2,3 Data4
SA D0H
Command Summary
Sector-Erase
Cycle(s)
Type1
Addr2,3
Data4
SDP5
2
2
2
1
2
7
7
W
W
W
W
W
R
X
X
X
X
20H
10H
30H
FFH
90H
W
N
N
N
Y
Y
Byte-Program
W
W
PA
X
PD
Chip-Erase6
30H
Reset
7
7
Read-ID
X
R
8
Software Data Protect
Software Data Unprotect
9
R
T4.3 310
1. Type definition: W = Write, R = Read, X can be VIL or VIH, but no other value.
2. Addr (Address) definition: SA = Sector Address = A18 - A8, sector size = 256 Bytes; A7- A0 = X for this command.
3. Addr (Address) definition: PA = Program Address = A18 - A0.
4. Data definition: PD = Program Data, H = number in hex.
5. SDP = Software Data Protect mode using 7 Read Cycle Sequence.
a) Y = the operation can be executed with protection enabled
b) N = the operation cannot be executed with protection enabled
6. The Chip-Erase function is not supported on SST28VF040A industrial parts.
7. Address 0000H retrieves the Manufacturer’s ID of BFH and address 0001H retrieves the Device ID of 04H.
8. Refer to Figure 11 for the 7 Read Cycle sequence for Software_Data_Protect.
9. Refer to Figure 10 for the 7 Read Cycle sequence for Software_Data_Unprotect.
TABLE 5: MEMORY ARRAY DETAIL
Sector Select
Byte Select
A18 - A8
A7 - A0
T5.0 310
©2001 Silicon Storage Technology, Inc.
S71077-04-000 6/01 310
6
SST [ SILICON STORAGE TECHNOLOGY, INC ]
