W78M32VP-XBX
FIGURE 9 – SECTOR ERASE OPERATION
Hardware Methods
Software Methods
Lock Register
(One Time Programmable)
WP#/ACC = VIL
(Highest or Lowest
Sector Locked)
Persistent Method
Password Method
(DQ1)
(DQ2)
64-bit Password
(One Time Protect)
1. Bit is volatile, and defaults to “1” on reset.
2. Programming to “0” locks all PPBs to their
current state.
3. Once programmed to “0”, requires hardware
reset to unlock.
PPB Lock Bit1,2,3
0 = PPBs Locked
1 = PPBs Unlocked
Persistent
Protection Bit
(PPB)4,5
Dynamic
Protection Bit
(DYB)6,7,8
Memory Array
Sector 0
Sector 1
Sector 2
PPB 0
PPB 1
PPB 2
DYB 0
DYB 1
DYB 2
Sector N-2
Sector N-1
Sector N3
PPB N-2
PPB N-1
PPB N
DYB N-2
DYB N-1
DYB N
3. N = Highest Address Sector.
4. 0 = Sector Protected,
1 = Sector Unprotected.
6. 0 = Sector Protected,
1 = Sector Unprotected.
5. PPBs programmed individually,
but cleared collectively
7. Protect effective only if PPB Lock Bit is
unlocked and corresponding PPB is “1”
(unprotected).
8. Volatile Bits: defaults to user choice upon
power-up (see ordering options).
Microsemi Corporation reserves the right to change products or specifications without notice.
August 2011 © 2011 Microsemi Corporation. All rights reserved.
Rev. 15
31
Microsemi Corporation • (602) 437-1520 • www.microsemi.com
MERCURY [ MERCURY UNITED ELECTRONICS INC ]
