lrs1331 Sharp Microelectronics of the Americas, lrs1331 Datasheet - Page 7

• Manufacturer Part Number: lrs1331
• Description: Stacked Chip Flash Memory Sram
• Manufacturer: Sharp Microelectronics of the Americas

Stacked Chip (16M Flash & 4M SRAM)
SR.7 = Write State Machine Status (WSMS)
SR.6 = Erase Suspend Status (BESS)
SR.5 = Erase and Clear Block
Lock-Bits Status (
SR.4 = Word/Byte Write and Set Lock-Bit
Status (WBWSLBS)
SR.3 = V
SR.2 = Word/Byte Write Suspend Status (WBWSS)
SR.1 = Device Protect Status (DPS)
SR.0 = Reserved for future enhancements (R)
Data Sheet
1 = Ready
0 = Busy
1 = Block Erase Suspended
0 = Block Erase in Progress/Completed
1 = Error in Block Erase, Bank Erase or
0 = Successful Block Erase, Bank Erase or
1 = Error in Word/Byte Write or Set
0 = Successful Word/Byte Write or Set
1 = V
0 = V
1 = Word/Byte Write Suspended
0 = Word/Byte Write in Progress/Completed
1 = Block Lock-Bits, Permanent Lock-Bits
0 = Unlock
WSMS
7
Clear Block Lock-Bits
Clear Block Lock-Bits
Block/Permanent Lock-Bit
Block/Permanent Lock-Bit
and/or F-WP Lock Detected, Operation Abort
CCW
CCW
CCW
Status (VCCWS)
LOW Detect, Operation Abort
Okay
ECBLBS
BESS
6
)
ECBLBS
5
Table 6. Status Register Definition
WBWSLBS
4
NOTES:
1. Check SR.7 to determine block erase, bank erase, word/byte
2. If both SR.5 and SR.4 are ‘1’s after a block erase, bank erase or
3. SR.3 does not provide a continuous indication of F-V
4. SR.1 does not provide a continuous indication of permanent and
5. SR.0 is reserved for future use and should be masked out when
VCCWS
write or lock-bit configuration completion. SR.6 - SR.0 are invalid
while SR.7 = 0.
lock-bit configuration attempt, an improper command sequence
was entered.
The WSM interrogates and indicates the F-V
block erase, bank erase, word/byte write or lock-bit configuration
command sequences. SR.3 is not guaranteed to report accurate
feedback only when F-V
block lock-bit and F-WP values. The WSM interrogates the perma-
nent lock-bit, block lock-bit and F-WP only after block erase, bank
erase, word/byte write or lock-bit configuration command
sequences. It informs the system, depending on the attempted
operation, if the block lock-bit is set, permanent lock-bit is set and/
or F-WP is V
gruation codes after writing the Read Identifier codes command
indicates permanent and block lock-bit status..
polling the status register.
3
IL
. Reading the block lock and permanent lock confi-
WBWSS
2
CCW
≠ F-V
CCWH
DPS
1
.
CCW
level only after
LRS1331
CCW
R
0
level.
7