Serial Quad I/O (SQI) Flash Memory
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 Name
Function
Power-up
0
1
RES
WEL
Reserved for future use
0
0
Write-Enable Latch status
1 = Device is memory Write enabled
0 = Device is not memory Write enabled
2
3
4
5
WSE
WSP
WPLD
SEC1
Write Suspend-Erase status
1 = Erase suspended
0 = Erase is not suspended
0
0
Write Suspend-Program status
1 = Program suspended
0 = Program is not suspended
Write Protection Lock-Down status
1 = Write Protection Lock-Down enabled
0 = Write Protection Lock-Down disabled
0
Security ID status
01
1 = Security ID space locked
0 = Security ID space not locked
6
7
RES
Reserved for future use
0
0
BUSY
Write operation status
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
T2.0 1359
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’.
©2010 Silicon Storage Technology, Inc.
S71359-05-000
06/10
9
SST [ SILICON STORAGE TECHNOLOGY, INC ]
