LRS1382 データシートの表示（PDF） - Sharp Electronics
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LRS1382 Datasheet PDF : 114 Pages
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LRS1382
12
5.6 Block Locking State Transitions upon Command Write(4)
Current State
Result after Lock Command Written (Next State)
State F-WP DQ1
DQ0
Set Lock(1)
Clear Lock(1)
Set Lock-down(1)
[000]
0
0
0
[001]
No Change
[011](2)
[001]
0
0
1
No Change(3)
[000]
[011]
[011]
0
1
1
No Change
No Change
No Change
[100]
1
0
0
[101]
No Change
[111](2)
[101]
1
0
1
[110]
1
1
0
No Change
[111]
[100]
No Change
[111]
[111](2)
[111]
1
1
1
No Change
[110]
No Change
Note:
1. "Set Lock" means Set Block Lock Bit command, "Clear Lock" means Clear Block Lock Bit command and "Set Lock-
down" means Set Block Lock-Down Bit command.
2. When the Set Block Lock-Down Bit command is written to the unlocked block (DQ0 = 0), the corresponding block is
locked-down and automatically locked at the same time.
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 VIL or VIH.
5.7 Block Locking State Transitions upon F-WP Transition(4)
Previous State
State
Current State
F-WP
DQ1
DQ0
Result after F-WP Transition (Next State)
F-WP = 0 1(1)
F-WP = 1 0(1)
-
[000]
0
0
0
[100]
-
-
[001]
0
0
1
[101]
-
[110](2)
[110]
-
[011]
0
1
1
Other than [110](2)
[111]
-
-
[100]
1
0
0
-
[000]
-
[101]
1
0
1
-
[001]
-
[110]
1
1
0
-
[011](3)
-
[111]
1
1
1
-
[011]
Note:
1. "F-WP = 0 1" means that F-WP is driven to VIH and "F-WP = 1 0" means that F-WP is driven to VIL
2. State transition from the current state [011] to the next state depends on the previous state.
3. When F-WP is driven to VIL in [110] state, the state changes to [011] and the blocks are automatically locked.
4. In this state transitions table, assumes that lock configuration commands are not written in previous, current and next state.
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