May 1, 2006 S29GL-N_01_A0
S29GL-N
47
Data
She e t
Legend
X = Don’t care.
RA = Address of the memory location to be read.
PWA = Password Address. Address bits A1 and A0 are used to select each 16-bit portion of the 64-bit entity.
PWD = Password Data.
RD(0) = DQ0 protection indicator bit. If protected, DQ0 = 0. If unprotected, DQ0 = 1.
Notes
1. All values are in hexadecimal.
2. Shaded cells indicate read cycles.
3. Address and data bits not specified in table, legend, or notes are don’t cares (each hex digit implies 4 bits of data).
4. Writing incorrect address and data values or writing them in the improper sequence may place the device in an unknown state. The system must write the reset
command to return the device to reading array data.
5. Entry commands are required to enter a specific mode to enable instructions only available within that mode.
6. No unlock or command cycles required when bank is reading array data.
7. Exit command must be issued to reset the device into read mode; device may otherwise be placed in an unknown state.
8. Entire two bus-cycle sequence must be entered for each portion of the password.
9. Full address range is required for reading password.
10. Password may be unlocked or read in any order. Unlocking requires the full password (all seven cycles).
11. ACC must be at VIH when setting PPB or DYB.
12. “All PPB Erase” command pre-programs all PPBs before erasure to prevent over-erasure.
Table 11.2 Sector Protection Commands (x16)
Command Sequence
(Notes)
Cyc
le
s
First
Second
Third
Fourth
Fifth
Sixth
Seventh
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Lock
Register
Bits
3
555
AA
2AA
55
555
40
2XX
A0
XXX
Data
100
Data
2XX
90
XX
00
Password
Protection
3
555
AA
2AA
55
555
60
2XX
A0
PWAx
PWDx
4
XXX
PWD
0
01
PWD1
02
PWD
2
03
PWD
3
700
25
00
03
00
PWD
0
01
PWD
1
02
PWD
2
03
PWD
3
00
29
2XX
90
XX
00
Non-Volatile
Sector
Protection
(PPB)
3
555
AA
2AA
55
555
C0
2XX
A0
SA
00
2
XX
80
00
30
PPB Status Read
1
SA
RD(0)
2XX
90
XX
00
Global
Volatile Sector
Protection
Freeze
(PPB Lock)
3
555
AA
2AA
55
555
50
PPB Lock Bit Set
2
XX
A0
XX
00
PPB Lock Bit Status Read
1
XXX
RD(0)
2XX
90
XX
00
Volatile Sector
Protection
(DYB)
3
555
AA
2AA
55
555
E0
DYB Set
2
XX
A0
SA
00
DYB Clear
2
XX
A0
SA
01
DYB Status Read
1
SA
RD(0)
2XX
90
XX
00