lh28f128bfht-pbtl75a Sharp Microelectronics of the Americas, lh28f128bfht-pbtl75a Datasheet - Page 17

• Manufacturer Part Number: lh28f128bfht-pbtl75a
• Description: Flash Memory 16mbit 8mbitx16
• Manufacturer: Sharp Microelectronics of the Americas

NOTES:
1. DQ
2. Erase and program are general terms, respectively, to express: block erase, full chip erase and
3. At power-up or device reset, all blocks default to locked state and are not locked-down, that is,
4. When WP#/ACC is driven to V
5. OTP (One Time Program) block has the lock function which is different from those described
NOTES:
1. "Set Lock" means Set Block Lock Bit command, "Clear Lock" means Clear Block Lock Bit
2. When the Set Block Lock-Down Bit command is written to the unlocked block (DQ
3. "No Change" means that the state remains unchanged after the command written.
4. In this state transitions table, assumes that WP#/ACC is not changed and fixed V
[000]
[001]
[011]
[100]
[101]
[110]
[111]
State
(page buffer) program operations.
[001] (WP#/ACC=0) or [101] (WP#/ACC=1), regardless of the states before power-off or reset
operation.
automatically locked.
above.
command and "Set Lock-down" means Set Block Lock-Down Bit command.
corresponding block is locked-down and automatically locked at the same time.
DQ
[000]
[001]
[011]
[100]
[101]
[110]
[111]
State
0
1
=1: a block is locked; DQ
=1: a block is locked-down; DQ
(4)
(3)
(3)
WP#/ACC
Current State
0
0
0
1
1
1
1
WP#/ACC
Table 7. Block Locking State Transitions upon Command Write
0
0
0
1
1
1
1
DQ
Table 6. Functions of Block Lock
1
0
0
0
0
1
1
1
DQ
DQ
0
0
1
0
0
1
1
Current State
1
0
1
1
0
1
0
1
0
(1)
=0: a block is unlocked.
0
IL
in [110] state, the state changes to [011] and the blocks are
DQ
1
=0: a block is not locked-down.
LHF12F17
No Change
0
1
1
0
1
0
1
Set Lock
No Change
No Change
No Change
0
(1)
[001]
[101]
Result after Lock Command Written (Next State)
[111]
Unlocked
Locked
Locked-down
Unlocked
Locked
Lock-down Disable
Lock-down Disable
(1)
(3)
State Name
(5)
and Block Lock-Down
Clear Lock
No Change
No Change
No Change
No Change
[000]
[100]
[110]
(1)
Erase/Program Allowed
(4)
Set Lock-down
IL
or V
No Change
No Change
[011]
[111]
[111]
[011]
[111]
0
IH
Yes
Yes
Yes
=0), the
No
No
No
No
.
(2)
(2)
(2)
Rev. 0.04
(1)
14
(2)