SST49LF008C-33-4C-NH View Datasheet(PDF) - Silicon Storage Technology
Part Name
Description
MFG CO.
SST49LF008C-33-4C-NH Datasheet PDF : 36 Pages
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4 Mbit / 8 Mbit LPC Serial Flash
SST49LF004C / SST49LF008C
DEVICE COMMANDS
Device operation is controlled by commands written to the
Command User Interface (CUI). Execution of a specific
command is handled by internal functions after a CUI
receives and processes the command. After power-up or a
Advance Information
Reset operation the device enters Read mode. Commands
consist of one or two sequential Bus-Write operations. The
commands are summarized in Table 8, “Software Com-
mand Sequence”.
TABLE 8: SOFTWARE COMMAND SEQUENCE
Command
Bus Cycles
Required
First Bus Cycle
Oper
Addr1
Data
Second Bus Cycle
Oper
Addr1
Data
Read-Array/Reset
1
Write
X
FFH
Read-Software-ID/
Read-Security-ID2,3,4
≥2
Write
X
90H
Read
IA5
ID6
Read-Status-Register3,4
2
Write
X
70H
Read
X
SRD7
Clear-Status-Register
1
Write
X
50H
Sector-Erase8
2
Write
X
30H
Write
SAx9
D0H
Block-Erase8
2
Write
X
20H
Write
BAx
D0H
Program8,10
2
Write
X
40H
Write
WA11
WD12
or
10H
Program-/Erase-Suspend
1
Write
X
B0H
Program-/Erase-Resume
1
Write
X
D0H
User-Security-ID-Program13
2
Write
X
A5H
Write
WA11
Data
User-Security-ID-Program-Lockout
2
Write
X
85H
Write
X
00H
Protected-Area-Sector-Erase8,14
2
Write
X
32H
Write
SA
D0H
Program-Protected-Area8,14
2
Write
X
42H
Write
WA
Data
Open-Protected-Area15
1
Write
X
62H
Hide-Protected-Area15
1
Write
X
6DH
T8.0 1292
1. This value must be a valid address within the device Memory Address Space. X can be VIH or VIL, but no other value.
2. SST Manufacturer’s ID = BFH, is read with A19-A0 = 0.
SST49LF004C/008C Device ID = 54H/59H, is read with A19-A1 = 0, A0 = 1.
Following the Read-Software-ID/Read-Security-ID command,
Read operations access Manufacturer’s ID and Device ID or Security ID.
3. Read-Software-ID/Read Security ID and Read Status Register will return ID/Register data until another valid command is written.
4. Following the Read-Software-ID/Read-Security-ID command, Read operations access manufacturer’s ID and Device ID or Security
ID. Read-Software-ID/Read-Security-ID and Read-Status-Register will return register data until another valid command is written.
5. IA = Device Identification Address/Security ID Address.
6. ID = Data read from identifier codes/Data read from Security ID
7. SRD = Data read from Status register
8. The sector or block must not be write-locked when attempting Erase or Program operations.
Attempts to issue an Erase or Program command to a write-locked sector/block will fail.
9. SAX for Sector-Erase Address
BAX for Block-Erase Address
10. The Program Command can operate on multiple bytes.
11. WA = Address of memory location to be written
12. WD = Data to be written at location WA
13. Valid addresses for the User Security ID space are from FFFC 0188H to FFFC 019FH.
14. Valid address WA of Protected Data Area location is from FFFC 8000H to FFFC AFFFH. For Sector Erase Command any address
within the sector in the Protected Data Area being erased can be used: PDA Sector 0 - SA+ FFC 8000H to FFFC 8FFFH. PDA Sec-
tor 1 - SA = FFFC 9000H to FFFC 9FFFH. PDA Sector 2 - SA = FFFC A000H to FFFC AFFFH.
15. After Open Protected Area command is executed the contents of the area can be read at addresses FFBC 8000H to FFBC AFFFH if
it is not read-locked. After Hide Protected Area command is executed the contents of the area is not accessible regardless of read-
lock status. By default (after Power On or reset) Protected Data Area is hidden.
©200 Silicon Storage Technology, Inc.
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