lrs1387 Sharp Microelectronics of the Americas, lrs1387 Datasheet - Page 14

• Manufacturer Part Number: lrs1387
• Description: Dual Work Boot Block Flash Sram
• Manufacturer: Sharp Microelectronics of the Americas

sharp
5.4 Block Locking State Transitions upon Command Write
Notes:
5.5 Block Locking State Transitions upon F-WP Transition
Notes:
1. “Set Lock” means Set Block Lock Bit command, “Clear Lock” means Clear Block Lock Bit command and “Set Lock-
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 F-WP is not changed and fixed V
1. “F-WP = 0 1” means that F-WP is driven to V
2. State transition from the current state [011] to the next state depends on the previous state.
3. When F-WP is driven to V
4. In this state transitions table, assumes that lock configuration commands are not written in previous, current and next state.
Other than [110]
[000]
[001]
[011]
[100]
[101]
[110]
State
[111]
Previous State
down” means Set Block Lock-Down Bit command.
locked-down and automatically locked at the same time.
[110]
-
-
-
-
-
-
F-WP
(2)
Current State
0
0
0
1
1
1
1
(2)
DQ
0
0
1
0
0
1
1
[000]
[001]
[011]
[100]
[101]
[110]
1
State
[111]
IL
DQ
in [110] state, the state changes to [011] and the blocks are automatically locked.
0
1
1
0
1
0
1
0
F-WP
Current State
0
0
0
1
1
1
1
No Change
Set Lock
No Change
No Change
No Change
DQ
[001]
[101]
0
0
1
0
0
1
1
[111]
IH
1
and “F-WP = 1 0” means that F-WP is driven to V
L R S1 3 8 7
(1)
(4)
Result after Lock Command Written (Next State)
(4)
(3)
DQ
0
1
1
0
1
0
1
0
F-WP = 0 1
Clear Lock
Result after F-WP Transition (Next State)
No Change
No Change
No Change
No Change
IL
[000]
[100]
[110]
[100]
[101]
[110]
[111]
or V
-
-
-
-
IH
(1)
.
(1)
0
= 0), the corresponding block is
Set Lock-down
F-WP = 1 0
No Change
No Change
IL
[111]
[111]
[011]
[011]
[111]
.
[000]
[001]
[011]
[011]
-
-
-
-
(2)
(2)
(2)
(3)
(1)
(1)
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