Serial Quad I/O (SQI) Flash Memory
A Microchip Technology Company
SST26VF016 / SST26VF032
Data Sheet
Reset-Enable (RSTEN) and Reset (RST)
The Reset operation is used as a system (software) reset that puts the device in normal operating
Ready mode. This operation consists of two commands: Reset-Enable (RSTEN) and Reset (RST).
To reset the SST26VF016/032, the host drives CE# low, sends the Reset-Enable command (66H), and
drives CE# high. Next, the host drives CE# low again, sends the Reset command (99H), and drives
CE# high, see Figure 7.
The Reset operation requires the Reset-Enable command followed by the Reset command. Any com-
mand other than the Reset command after the Reset-Enable command will disable the Reset-Enable.
A successful command execution will reset the burst length to 8 Bytes and all the bits in the Status reg-
ister to their default states, except for bit 4 (WPLD) and bit 5 (SEC). A device reset during an active
Program or Erase operation aborts the operation, which can cause the data of the targeted address
range to be corrupted or lost. Depending on the prior operation, the reset timing may vary. Recovery
from a Write operation requires more latency time than recovery from other operations.
T CPH
CE#
CLK
SIO(3:0)
MODE 3
MODE 0
C1 C0
MODE 3
MODE 0
C3 C2
MODE 3
MODE 0
1359 F05.0
Note: C[1:0] = 66H; C[3:2] = 99H
Figure 7: Reset sequence
?2011 Silicon Storage Technology, Inc.
13
DS-25017A
04/11
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