Datasheet
©2011 Silicon Storage Technology, Inc. DS25008A 08/11
25
64 Mbit Multi-Purpose Flash Plus
SST39VF6401B / SST39VF6402B
Not Recommended for New Designs
A
Microchip Technology Company
Figure 13:Software ID Exit/CFI Exit
Figure 14:Sec ID Entry
1288 F13.0
ADDRESS A
14-0
DQ
15-0
T
IDA
T
WP
T
WHP
WE#
SW0 SW1 SW2
555 2AA 555
THREE-BYTE SEQUENCE FOR
SOFTWARE ID EXIT AND RESET
OE#
CE#
XXAA XX55 XXF0
Note: WP# must be held in proper logic state (V
IL
or V
IH
) 1 µs prior to and 1 µs after the command sequence.
X can be V
IL
or V
IH,
but no other value.
1288 F14.0
ADDRESS A
MS-0
T
IDA
DQ
15-0
WE#
SW0 SW1 SW2
555 2AA 555
OE#
CE#
THREE-BYTE SEQUENCE FOR
CFI QUERY ENTRY
T
WP
T
WPH
T
AA
XX55XXAA XX88
Note: A
MS
= Most significant address
A
MS
=A
21
for SST39VF640xB
WP# must be held in proper logic state (V
IL
or V
IH
) 1 µs prior to and 1 µs after the command sequence.
X can be V
IL
or V
IH,
but no other value.