SST26VF064B_15 Datasheet, PDF (10/85 Pages) Microchip Technology – 2.5V/3.0V 64 Mbit Serial Quad I/O (SQI) Flash Memory

SST26VF064B / SST26VF064BA
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
0 BUSY
1 WEL
2 WSE
3 WSP
4 WPLD
5 SEC¹
6 RES
7 BUSY
Function
Write operation status
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
Write-Enable Latch status
1 = Device is write-enabled
0 = Device is not write-enabled
Write Suspend-Erase status
1 = Erase suspended
0 = Erase is not suspended
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
Security ID status
1 = Security ID space locked
0 = Security ID space not locked
Reserved for future use
Write operation status
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
Default at
Power-up
0
Read/Write (R/
W)
R
0
R
0
R
0
R
0
R
0¹
R
0
R
0
R
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’.
DS20005119G-page 10
 2015 Microchip Technology Inc.