Datasheet

SST26VF064B / SST26VF064BA
DS20005119G-page 10  2015 Microchip Technology Inc.
4.5 Status Register
The Status register is a read-only register that provides
the following status information: whether the flash
memory array is available for any Read or Write oper-
ation, if the device is write-enabled, whether an erase
or program operation is suspended, and if the Block-
Protection register and/or Security ID are locked down.
During an internal Erase or Program operation, the Sta-
tus register may be read to determine the completion of
an operation in progress. Table 4-2 describes the func-
tion of each bit in the Status register.
TABLE 4-2: STATUS REGISTER
Bit Name Function
Default at
Power-up
Read/Write (R/
W)
0 BUSY Write operation status
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
0R
1 WEL Write-Enable Latch status
1 = Device is write-enabled
0 = Device is not write-enabled
0R
2 WSE Write Suspend-Erase status
1 = Erase suspended
0 = Erase is not suspended
0R
3 WSP Write Suspend-Program status
1 = Program suspended
0 = Program is not suspended
0R
4 WPLD Write Protection Lock-Down status
1 = Write Protection Lock-Down enabled
0 = Write Protection Lock-Down disabled
0R
5 SEC
1
1. The Security ID status will always be ‘1’ at power-up after a successful execution of the Lockout Security ID instruction, oth-
erwise default at power-up is ‘0’.
Security ID status
1 = Security ID space locked
0 = Security ID space not locked
0
1
R
6 RES Reserved for future use 0R
7 BUSY Write operation status
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
0R