Document Number: 001-98285 Rev. *R
Page 50 of 108
S29GL01GS/S29GL512S
S29GL256S/S29GL128S
Table 5.21
Secure Silicon Sector Program State Command Transition
Current State
Command and
Condition
Read
Software Reset /
ASO Exit
Status Register
Read Enter
Status Register
Clear
Unlock 1
Command Set
Exit
Address
RA
xh
x555h
x555h
x555h
xh
Data
RD
xF0h
x70h
x71h
xAAh
x00h
SSRPG1
–
SSRPG1
–
–
SSRPG1
–
–
SSR_WB
WC > 256 or SA
SA
SSR_WB
–
–
–
–
–
WC
256 and
SA = SA
SSR_WB_D
WC < 0 or Write
Buffer
Write
Buffer
SSR_WB_D
–
–
–
–
–
WC > 0 and Write
Buffer = Write
Buffer
SSRPG
SR(7) = 0
SSRPG
–
SSRSR
(SSRPG)
–
–
–
SR(7) = 1
SSR
SR(7) = 1 and
DQ(1) = 0
READ
DQ(1) = 1
–
–
SSRUL1
SR(3) = 1
SSRSR
–
(return)
–
–
–
–
–
SSREXT
–
SSREXT
–
SSRSR (SSR)
–
–
READ
Table 5.22
Password Protection Command State Transition
Current
State
Command
and
Condition
Read
Software
Reset /
ASO Exit
Status
Register
Read
Enter
Status
Register
Clear
Password
ASO
Unlock
Enter
Password
ASO
Unlock
Start
Command
Set Exit
Entry
Command
Set Exit
Program
Entry
Password
Word
Count
Address
RA
xh
x555h
x555h
0h
0h
xh
xh
xh
Xh
Data
RD
xF0h
x70h
x71h
x25h
x29h
x90h
x00h
xA0h
x03h
PP
–
PP
READ
PPSR (PP)
PP
PPWB25
–
PPEXT
–
PPPG1
–
PPWB25
–
PPWB25
–
–
–
–
–
–
–
–
PPD
PPD
WC > 0
PPD
–
–
–
–
–
–
–
–
–
WC
0
-
PPPG
PPPG1
–
PPPG1
–
–
–
–
–
–
–
–
–
PPPG
–
PPPG
–
PPSR
(PPPG)
–
–
–
–
–
–
–
PPSR
–
(return)
–
–
–
–
–
–
–
–
–
PPEXT
–
PPEXT
–
–
–
–
–
–
READ
–
–