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16 Mbit LPC Serial Flash
A Microchip Technology Company
SST49LF016C
Data Sheet
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 com-
mand. After power-up or a 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
Bus Cycles
First Bus Cycle
Second Bus Cycle
Command
Required
Oper
Addr 1
Data
Oper
Addr 1
Data
Read-Array/Reset
1
Write
X
FFH
Read-Software-ID 2 /
? 2
Write
X
90H
Read
IA 4
ID 5
Read-Security-ID 3
Read-Status-Register 3
2
Write
X
70H
Read
X
SRD 6
Clear-Status-Register
1
Write
X
50H
Sector-Erase 7
Block-Erase 7
Program 7 , 9
2
2
2
Write
Write
Write
X
X
X
30H
20H
40H
Write
Write
Write
SAx 8
BAx
WA 10
D0H
D0H
WD 11
or
10H
Program-/Erase-Suspend
Program-/Erase-Resume
1
1
Write
Write
X
X
B0H
D0H
User-Security-ID-Program 12
User-Security-ID-Program-Lockout
2
2
Write
Write
X
X
A5H
85H
Write
Write
WA 10
X
Data
00H
T8.0 25029
1. This value must be a valid address within the device Memory Address Space. X can be V IH or V IL, but no other value.
2. SST Manufacturer’s ID = BFH, is read with A 20 -A 0 = 0.
SST49LF016C Device ID = 5CH, is read with A 20 -A 1 = 0, A 0 = 1.
Following the Read-Software-ID/Read-Security-ID command,
Read operations access Manufacturer’s ID and Device ID or Security ID.
3. 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.
4. IA = Device Identification Address/Security ID Address.
5. ID = Data read from identifier codes/Data read from Security ID
6. SRD = Data read from Status register
7. 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.
8. SA X for Sector-Erase Address
BA X for Block-Erase Address
9. The Program command operates on multiple bytes.
10. WA = Address of memory location to be written
11. WD = Data to be written at location WA
12. Valid addresses for the User Security ID space are from FFFC 0188H to FFFC 019FH.
?2011 Silicon Storage Technology, Inc.
16
DS25029A
06/11
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