LRS1383 View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LRS1383' PDF : 114 Pages View PDF
FUM00701
42
Table 12. Block Locking State Transitions upon Command Write(4)
Current State
Result after Lock Command Written (Next State)
State WP# DQ1 DQ0
[000] 0
0
0
[001] 0
0
1
[011] 0
1
1
[100] 1
0
0
[101] 1
0
1
[110] 1
1
0
[111] 1
1
1
Set Lock(1)
[001]
No Change(3)
No Change
[101]
No Change
[111]
No Change
Clear Lock(1)
No Change
[000]
No Change
No Change
[100]
No Change
[110]
Set Lock-down(1)
[011](2)
[011]
No Change
[111](2)
[111]
[111](2)
No Change
NOTES:
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 WP# is not changed and fixed VIL or VIH.
Table 13. Block Locking State Transitions upon WP# Transition(4)
Previous State
State
Current State
WP# DQ1
Result after WP# Transition (Next State)
DQ0
WP#=0 1(1)
WP#=1 0(1)
-
[000]
0
0
0
[100]
-
-
[001]
0
0
1
[101]
-
[110](2)
Other than [110](2)
-
[011]
[100]
0
1
1
1
0
0
[110]
[111]
-
-
-
[000]
-
[101]
1
0
1
-
[001]
-
[110]
1
1
0
-
[011](3)
-
[111]
1
1
1
-
[011]
NOTES:
1. "WP#=0 1" means that WP# is driven to VIH and "WP#=1 0" means that WP# is driven to
VIL
2. State transition from the current state [011] to the next state depends on the previous state.
3. When 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.
Appendix to Spec No.: MFM2-J13207 Model No.: LRS1383 March 1, 2001
Rev. 2.20
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