SST25VF020B-80-4C-SAE-T Microchip Technology, SST25VF020B-80-4C-SAE-T Datasheet - Page 7

• Manufacturer Part Number: SST25VF020B-80-4C-SAE-T
• Description: 2.7V To 3.6V 2Mbit SPI Serial Flash 8 SOIC 3.90mm (.150") T/R
• Manufacturer: Microchip Technology

Specifications of SST25VF020B-80-4C-SAE-T

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 2M (256K x 8)
• Speed: 80MHz
• Interface: SPI Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A Microchip Technology Company
©2011 Silicon Storage Technology, Inc.
Status Register
Software Status Register 1
The software status register provides status on whether the flash memory array is available for any
Read or Write operation, whether the device is Write enabled, and the state of the Memory Write pro-
tection. During an internal Erase or Program operation, the status register may be read only to deter-
mine the completion of an operation in progress. Table 3 describes the function of each bit in the
software status register.
Table 3: Software Status Register
The Software Status Register 1 is an additional register that contains Top Sector and Bottom Sector
Protection bits. These register bits are read/writable and determine the lock and unlock status of the
top and bottom sectors.
Table 4 describes the function of each bit in the Software Status Register 1.
Table 4: Software Status Register 1
Bit
4:5
Bit
0:1
4:7
0
1
2
3
6
7
2
3
Name
BUSY
WEL
BP0
BP1
RES
AAI
BPL
Name
RES
TSP
BSP
RES
Function
1 = Internal Write operation is in progress
0 = No internal Write operation is in progress
1 = Device is memory Write enabled
0 = Device is not memory Write enabled
Indicates current level of block write protection (See Table
5)
Indicates current level of block write protection (See Table
5)
Reserved for future use
Auto Address Increment Programming status
1 = AAI programming mode
0 = Byte-Program mode
1 = BP1, BP0 are read-only bits
0 = BP1, BP0 are read/writable
Function
Reserved for future use
Top Sector Protection status
1 = Indicates highest sector is write locked
0 = Indicates highest sector is Write accessible
Bottom Sector Protection status
1 = Indicates lowest sector is write locked
0 = Indicates lowest sector is Write accessible
Reserved for future use
7
2 Mbit SPI Serial Flash
Default at
Power-up
Default at
Power-up
SST25VF020B
0
0
1
1
0
0
0
0
0
0
0
S71417-03-000
Read/Write
Read/Write
Data Sheet
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
R
R
R
T3.0 1417
T4.0 1417
02/11