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參數(shù)資料
型號(hào)： W28F641B
廠商： WINBOND ELECTRONICS CORP
英文描述： 64MBIT (4MBIT 】 16) PAGE MODE DUAL WORK FLASH MEMORY
中文描述： 64兆比特（的4Mb】16）頁(yè)模式的雙工作閃存
文件頁(yè)數(shù)： 12/31頁(yè)
文件大?。?/td> 389K
代理商： W28F641B
W28F641B/T
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 V
IL
or V
IH
.
Table 9. Block Locking State Transitions upon #WP Transition
(4)
CURRENT STATE
RESULT AFTER #WP TRANSITION
(NEXT STATE)
1
(1)
PREVIOUS STATE
State
#WP
DQ1
DQ0
#WP = 0
→
#WP = 1
→
0
(1)
-
[000]
0
0
0
[100]
-
-
[001]
0
0
1
[101]
-
[110]
(2)
[110]
-
Other than [110]
(2)
[011]
0
1
1
[111]
-
-
[100]
1
0
0
-
[000]
-
[101]
1
0
1
-
[001]
[011]
(3)
-
[110]
1
1
0
-
-
[111]
1
1
1
-
[011]
Notes:
1. "#WP = 0
→
1" means that #WP is driven to V
IH
and "#WP = 1
→
0" means that #WP is driven to V
IL
.
2. State transition from the current state [011] to the next state depends on the previous state.
3. When #WP is driven to V
IL
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.
- 12 -
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