lh28f640 Sharp Microelectronics of the Americas, lh28f640 Datasheet - Page 14

• Manufacturer Part Number: lh28f640
• Description: 64m X16 Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

SR.7 = WRITE STATE MACHINE STATUS (WSMS)
SR.3 = RESERVED FOR FUTURE ENHANCEMENTS (R)
SR.0 = RESERVED FOR FUTURE ENHANCEMENTS (R)
SR.15 - SR.8 = RESERVED FOR FUTURE
SR.6 = BLOCK ERASE SUSPEND STATUS (BESS)
SR.5 = BLOCK ERASE AND FULL CHIP ERASE
SR.4 = (PAGE BUFFER) PROGRAM AND
SR.2 = (PAGE BUFFER) PROGRAM SUSPEND
SR.1 = DEVICE PROTECT STATUS (DPS)
ENHANCEMENTS (R)
WSMS
1 = Ready
0 = Busy
1 = Block Erase Suspended
0 = Block Erase in Progress/Completed
1 = Error in Block Erase or Full Chip Erase
0 = Successful Block Erase or Full Chip Erase
1 = Error in (Page Buffer) Program or OTP Program
0 = Successful (Page Buffer) Program or OTP Program
1 = (Page Buffer) Program Suspended
0 = (Page Buffer) Program in Progress/Completed
1 = Erase or Program Attempted on a
0 = Unlocked
15
R
7
Locked Block, Operation Abort
STATUS (BEFCES)
STATUS (PBPSS)
OTP PROGRAM STATUS (PBPOPS)
BESS
14
R
6
BEFCES
13
R
5
Table 7. Status Register Definition
PBPOPS
12
R
4
LHF64FZ2
Check SR.7 to determine block erase, full chip erase, (page
buffer) program or OTP program completion. SR.6 - SR.1 are
invalid while SR.7="0".
If both SR.5 and SR.4 are "1"s after a block erase, full chip
erase, page buffer program, set/clear block lock bit, set block
lock-down bit, attempt, an improper command sequence was
entered.
SR.1 does not provide a continuous indication of block lock
bit. The WSM interrogates the block lock bit only after Block
Erase, Full Chip Erase, (Page Buffer) Program or OTP
Program command sequences. It informs the system,
depending on the attempted operation, if the block lock bit is
set. Reading the block lock configuration codes after writing
the Read Identifier Codes/OTP command indicates block
lock bit status.
SR.15 - SR.8, SR.3 and SR.0 are reserved for future use and
should be masked out when polling the status register.
11
R
R
3
PBPSS
10
R
2
NOTES:
DPS
R
9
1
Rev. 2.41
R
R
8
0
12