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參數(shù)資料
| 型號： | W28F321TB70L |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 2M X 16 FLASH 1.8V PROM, 70 ns, PBGA48 |
| 封裝： | 7 X 7 MM, 0.75 MM PITCH, TFBGA-48 |
| 文件頁數(shù)： | 2/28頁 |
| 文件大?。?/td> | 372K |
| 代理商： | W28F321TB70L |
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W28F321BB/TB
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8. If the program operation in one partition is suspended and the erase operation in other partition is also suspended, the
suspended program operation should be resumed first, and then the suspended erase operation should be resumed next.
9. Full chip erase and OTP program operations can not be suspended. The OTP Program command can not be accepted while
the block erase operation is being suspended.
10. Following the Clear Block Lock Bit command, block which is not locked-down is unlocked when #WP is VIL. When #WP is
VIH, lock-down bit is disabled and the selected block is unlocked regardless of lock-down configuration.
11. Commands other than those shown above are reserved by Winbond for future device implementations and should not be
used.
Table 7. Functions of Block Lock(5) and Block Lock-Down
CURRENT STATE
State
#WP
DQ1(1)
DQ0(1)
State Name
Erase/Program Allowed(2)
[000]
0
Unlocked
Yes
[001]
(3)
0
1
Locked
No
[011]
0
1
Locked-down
No
[100]
1
0
Unlocked
Yes
[101]
(3)
1
0
1
Locked
No
[110]
(4)
1
0
Lock-down Disable
Yes
[111]
1
Lock-down Disable
No
Notes:
1. DQ0 = 1: a block is locked; DQ0 = 0: a block is unlocked.
DQ1 = 1: a block is locked-down; DQ1 = 0: a block is not locked-down.
2. Erase and program are general terms, respectively, to express: block erase, full chip erase and (page buffer) program
operations.
3. At power-up or device reset, all blocks default to locked state and are not locked-down, that is, [001] (#WP = 0) or [101] (#WP
= 1), regardless of the states before power-off or reset operation.
4. When #WP is driven to VIL in [110] state, the state changes to [011] and the blocks are automatically locked.
5. OTP (One Time Program) block has the lock function, which is different from those described above.
Table 8. Block Locking State Transitions upon Command Write(4)
CURRENT STATE
RESULT AFTER LOCK COMMAND WRITTEN (Next State)
State
#WP
DQ1
DQ0
Set Lock(1)
Clear Lock(1)
Set Lock-down(1)
[000]
0
[001]
No Change
[011]
(2)
[001]
0
1
No Change
(3)
[000]
[011]
0
1
No Change
[100]
1
0
[101]
No Change
[111]
(2)
[101]
1
0
1
No Change
[100]
[111]
[110]
1
0
[111]
No Change
[111]
(2)
[111]
1
No Change
[110]
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.
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