參數(shù)資料
型號(hào)： M28W640FCT85ZB1
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 4M X 16 FLASH 3V PROM, 85 ns, PBGA48
封裝： 6.39 X 10.50 MM, 0.75 PITCH, TFBGA-48
文件頁(yè)數(shù)： 13/55頁(yè)
文件大小： 1141K
代理商： M28W640FCT85ZB1
M28W640FCT, M28W640FCB
20/55
gram/Erase Controller Status bit is High (Program/
Erase Controller inactive). Bit 2 is set within 5s of
the Program/Erase Suspend command being is-
sued therefore the memory may still complete the
operation rather than entering the Suspend mode.
When a Program/Erase Resume command is is-
sued the Program Suspend Status bit returns Low.
Block Protection Status (Bit 1). The Block Pro-
tection Status bit can be used to identify if a Pro-
gram or Erase operation has tried to modify the
contents of a locked block.
When the Block Protection Status bit is High (set
to ‘1’), a Program or Erase operation has been at-
tempted on a locked block.
Once set High, the Block Protection Status bit can
only be reset Low by a Clear Status Register com-
mand or a hardware reset. If set High it should be
reset before a new command is issued, otherwise
the
new
command
will
appear
to
fail.
Reserved (Bit 0). Bit 0 of the Status Register is
reserved. Its value must be masked.
AND PSEUDO CODES, for using the Status
Register.
Table 11. Status Register Bits
Note: Logic level '1' is High, '0' is Low.
Bit
Name
Logic Level
Definition
7
P/E.C. Status
'1'
Ready
'0'
Busy
6
Erase Suspend Status
'1'
Suspended
'0'
In progress or Completed
5
Erase Status
'1'
Erase Error
'0'
Erase Success
4
Program Status
'1'
Program Error
'0'
Program Success
3
VPP Status
'1'
VPP Invalid, Abort
'0'
VPP OK
2
Program Suspend Status
'1'
Suspended
'0'
In Progress or Completed
1
Block Protection Status
'1'
Program/Erase on protected Block, Abort
'0'
No operation to protected blocks
0
Reserved
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