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Serial Quad I/O (SQI) Flash Memory
A Microchip Technology Company
SST26VF016 / SST26VF032
Data Sheet
Status Register
The Status register is a read-only register that provides status on whether the flash memory array is
available for any Read or Write operation, whether the device is Write enabled, and whether an erase
or program operation is suspended. During an internal Erase or Program operation, the Status register
may be read to determine the completion of an operation in progress. Table 2 describes the function of
each bit in the Status register.
Table 2: Status Register
Default at
Bit
0
1
Name
RES
WEL
Function
Reserved for future use
Write-Enable Latch status
Power-up
0
0
1 = Device is memory Write enabled
0 = Device is not memory Write enabled
2
WSE
Write Suspend-Erase status
0
1 = Erase suspended
0 = Erase is not suspended
3
WSP
Write Suspend-Program status
0
1 = Program suspended
0 = Program is not suspended
4
WPLD
Write Protection Lock-Down status
0
1 = Write Protection Lock-Down enabled
0 = Write Protection Lock-Down disabled
5
SEC 1
Security ID status
0 1
1 = Security ID space locked
0 = Security ID space not locked
6
7
RES
BUSY
Reserved for future use
Write operation status
0
0
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
T2.0 25017
1. The Security ID status will always be ‘1’ at power-up after a successful execution of the Lockout Sec ID instruction, oth-
erwise default at power-up is ‘0’.
?2011 Silicon Storage Technology, Inc.
9
DS-25017A
04/11
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