M50FW002 データシートの表示（PDF） - STMicroelectronics
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M50FW002 Datasheet PDF : 39 Pages
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M50FW002
Program Suspend Status (Bit 2). The Program
Suspend Status bit indicates that a Program oper-
ation has been suspended and is waiting to be re-
sumed. The Program Suspend Status should only
be considered valid when the Program/Erase
Controller Status bit is ‘1’ (Program/Erase Control-
ler inactive); after a Program/Erase Suspend com-
mand is issued the memory may still complete the
operation rather than entering the Suspend mode.
When the Program Suspend Status bit is ‘0’ the
Program/Erase Controller is active or has complet-
ed its operation; when the bit is ‘1’ a Program/
Erase Suspend command has been issued and
the memory is waiting for a Program/Erase Re-
sume command.
When a Program/Erase Resume command is is-
sued the Program Suspend Status bit returns to
‘0’.
Block Protection Status (Bit 1). The Block Pro-
tection Status bit can be used to identify if the Pro-
gram or Erase operation has tried to modify the
contents of a protected block. When the Block Pro-
tection Status bit is to ‘0’ no Program or Erase op-
erations have been attempted to protected blocks
since the last Clear Status Register command or
hardware reset; when the Block Protection Status
bit is ‘1’ a Program or Erase operation has been at-
tempted on a protected block.
Once it is set to ‘1’ the Block Protection Status bit
can only be reset to ‘0’ by a Clear Status Register
command or a hardware reset. If it is set to ‘1’ it
should be reset before a new Program or Erase
command is issued, otherwise the new command
will appear to fail.
Using the A/A Mux Interface the Block Protection
Status bit is always ‘0’.
Reserved (Bit 0). Bit 0 of the Status Register is
reserved. Its value should be masked.
Table 10. Status Register Bits
Operation
Bit 7 Bit 6
Program active
‘0’
X1
Program suspended
‘1
X1
Program completed successfully
‘1’
X1
Program failure due to VPP Error
‘1’
X1
Program failure due to Block Protection (FWH Interface only)
‘1’
X1
Program failure due to cell failure
‘1’
X1
Erase active
‘0’
‘0’
Block Erase suspended
‘1’
‘1’
Erase completed successfully
‘1’
‘0’
Erase failure due to VPP Error
‘1’
‘0’
Block Erase failure due to Block Protection (FWH Interface
only)
‘1’
‘0’
Erase failure due to failed cell(s)
‘1’
‘0’
Note: 1. For Program operations during Erase Suspend Bit 6 is ‘1’, otherwise Bit 6 is ‘0’.
Bit 5
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘1’
Bit 4
‘0’
‘0’
‘0’
‘0’
‘0’
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
Bit 3
‘0’
‘0’
‘0’
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
‘1’
‘0’
‘0’
Bit 2
‘0’
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
Bit 1
‘0’
‘0’
‘0’
‘0’
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
‘1’
‘0’
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