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參數(shù)資料
| 型號： | TMS28F400BZB90BDBJE |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 8-BIT/262144 BY 16-BIT BOOT-BLOCK FLASH MEMORIES |
| 中文描述： | 8-BIT/262144由16位啟動塊閃存 |
| 文件頁數(shù)： | 14/29頁 |
| 文件大?。?/td> | 404K |
| 代理商： | TMS28F400BZB90BDBJE |
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TMS28F400BZT, TMS28F400BZB
524288 BY 8-BIT/262144 BY 16-BIT
BOOT-BLOCK FLASH MEMORIES
SMJS400E – JUNE 1994 – REVISED JANUARY 1998
14
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
BUS
OPERATION
COMMAND
COMMENTS
Write
Write-erase
setup
Data =
Block Addr =
20h
Address
within
block to
be
erased
Write
Erase
Data =
Block Addr =
D0h
Address
within
block to
be
erased
Read
Status-register data.
Toggle G or E to update
status register
Standby
Check SB7
1 = Ready, 0 = Busy
Repeat for subsequent blocks.
Write FFh after the last block-erase operation to reset the
device to read array mode.
BUS
OPERATION
COMMAND
COMMENTS
Standby
Check SB3
1 = Detect VPP low
(see Note B)
Standby
Check SB4 and SB5
1 = Block-erase
command error
Standby
Check SB5
1 = Block-erase failed
(see Note C)
NOTES: A. Full status-register check can be done after each word or after a sequence of words.
B. SB3 must be cleared before attempting additional program/erase operations.
C. SB5 is cleared only by the clear-status-register command in cases where multiple blocks are erased before full status is checked.
Figure 5. Automated Block-Erase Flowchart
Start
Issue Erase-Setup Command and
Block Address
Issue Block-Erase-Confirm
Command and Block Address
Read
Status-Register Bits
SB7 = 1
No
Full Status-Register
Check (optional)
See Note A
Yes
Block-Erase Completed
FULL STATUS-REGISTER CHECK FLOW
Read Status-Register
Bits
SB3 = 0
No
Yes
VPP Range Error
SB4 = 1,
SB5 = 1
Yes
No
Command-Sequence
Error
Block-Erase Passed
Erase-
Suspend
Yes
No
Erase-
Suspend
Loop
SB5 = 0
No
Block-Erase Failed
Yes
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