16 Mbit SPI Serial Flash
SST25VF016B
A Microchip Technology Company
Data Sheet
4-KByte Sector-Erase
The Sector-Erase instruction clears all bits in the selected 4 KByte sector to FFH. A Sector-Erase
instruction applied to a protected memory area will be ignored. Prior to any Write operation, the Write-
Enable (WREN) instruction must be executed. CE# must remain active low for the duration of any com-
mand sequence. The Sector-Erase instruction is initiated by executing an 8-bit command, 20H, fol-
lowed by address bits [A23-A0]. Address bits [AMS-A12] (AMS = Most Significant address) are used to
determine the sector address (SAX), remaining address bits can be VIL or VIH. CE# must be driven high
before the instruction is executed. The user may poll the Busy bit in the software status register or wait
TSE for the completion of the internal self-timed Sector-Erase cycle. See Figure 12 for the Sector-
Erase sequence.
CE#
MODE 3
0
1
2
3
4
5
6
7
8
15 16
23
31
24
MODE 0
SCK
20
ADD.
MSB
ADD.
ADD.
SI
MSB
HIGH IMPEDANCE
SO
1271 SecErase.0
Figure 12:Sector-Erase Sequence
©2011 Silicon Storage Technology, Inc.
S71271-04-000
01/11
15
SST [ SILICON STORAGE TECHNOLOGY, INC ]
