MX28F640C3T Macronix International, MX28F640C3T Datasheet - Page 19

• Manufacturer Part Number: MX28F640C3T
• Description: 64M-BIT [4M x16] CMOS SINGLE VOLTAGE 3V ONLY FLASH MEMORY
• Manufacturer: Macronix International

Table 6. Status Register Definition
SR.7 = WRITE STATE MACHINE STATUS (WSMS)
SR.6 = SECTOR ERASE SUSPEND STATUS (ESS)
SR.5 = ERASE STATUS (ES)
SR.4 = PROGRAM STATUS (PS)
SR.3 = VPP STATUS (VPPS)
SR.2 = PROGRAM SUSPEND STATUS (PSS)
SR.1 = SECTOR LOCK STATUS
SR.0 = RESERVED FOR FUTURE ENHANCEMENTS
P/N:PM0900
WSMS
1 = Ready
0 = Busy
1 = Sector ERASE Suspended
0 = Sector Erase in Progress/Completed
1 = Error in Programming
0 = Successful Sector Erase or Clear Sector Lock-
1 = Error in Programming
0 = Successful Programming
1 = VPP Low Detect, Operation Abort
0 = VPP OK
1 = Program Suspended
0 = Program in Progress/Completed
1 =Program/Erase attempted an a locked sector;
0 = No operation to locked sectors
7
Bits
operation aborted
(R)
BESS
6
ES
5
PS
4
VPPS
19
3
NOTES:
Check WSM bit first to determine word program or sec-
tor Erase completion, before checking Program or Erase
Status bits.
When Erase Suspend is issued, WSM halts execution
and sets both WSMs and ESS bits to "1". ESS bit re-
mains set to "1" until an Erase Resume command is
issued.
When this bit (SR.5) is set to "1", it means WSM is
unable to verify successful sector erasure.
When this bit is set to "1", WSM has attempted but failed
to program a word.
SR.3 bit is not guaranteed to report accurate feedback
between VPPLK and VPP min.
When program suspend is issued, WSM halts the ex-
ecution and sets both WSMs and SR.2 bit to "1". SR.2
remains set to "1" until a Program Resume command is
issued.
If a program or erase operation is attempted to one of
the locked sectors, this bit is set by the WSM. The op-
eration specified is aborted and the device is returned to
read status mode.
SR. 0 is reserved for future use and should be masked
out when polling the status register.
MX28F640C3T/B
PSS
2
BLS
1
w w w . D a t a S h e e t 4 U
REV. 0.6, AUG. 20, 2003
R
0