LH28F800BGHE-TL12 データシートの表示（PDF） - Sharp Electronics
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LH28F800BGHE-TL12 Datasheet PDF : 43 Pages
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LH28F800BG-L/BGH-L (FOR TSOP, CSP)
Table 5 Write Protection Alternatives
OPERATION VPP RP# WP#
EFFECT
VIL X X All Blocks Locked.
Block Erase
VIL X All Blocks Locked.
or
> VPPLK VHH X All Blocks Unlocked.
Word Write
VIH VIL 2 Boot Blocks Locked.
VIH All Blocks Unlocked.
Table 6 Status Register Definition
WSMS
ESS
ES
WWS
VPPS
WWSS
DPS
R
7
6
5
4
3
2
1
0
SR.7 = WRITE STATE MACHINE STATUS (WSMS)
1 = Ready
0 = Busy
NOTES :
Check RY/BY# or SR.7 to determine block erase or word
write completion. SR.6-0 are invalid while SR.7 = "0".
SR.6 = ERASE SUSPEND STATUS (ESS)
1 = Block Erase Suspended
0 = Block Erase in Progress/Completed
SR.5 = ERASE STATUS (ES)
1 = Error in Block Erase
0 = Successful Block Erase
If both SR.5 and SR.4 are "1"s after a block erase attempt, an
improper command sequence was entered.
SR.4 = WORD WRITE STATUS (WWS)
1 = Error in Word Write
0 = Successful Word Write
SR.3 = VPP STATUS (VPPS)
1 = VPP Low Detect, Operation Abort
0 = VPP OK
SR.2 = WORD WRITE SUSPEND STATUS (WWSS)
1 = Word Write Suspended
0 = Word Write in Progress/Completed
SR.1 = DEVICE PROTECT STATUS (DPS)
1 = WP# or RP# Lock Detected, Operation Abort
0 = Unlock
SR.3 does not provide a continuous indication of VPP level.
The WSM interrogates and indicates the VPP level only after
Block Erase or Word Write command sequences.
SR.3 is not guaranteed to reports accurate feedback only
when VPP ≠ VPPH1/2/3.
The WSM interrogates the WP# and RP# only after Block
Erase or Word Write command sequences. It informs the
system, depending on the attempted operation, if the WP# is
not VIH, RP# is not VHH.
SR.0 = RESERVED FOR FUTURE ENHANCEMENTS (R) SR.0 is reserved for future use and should be masked out
when polling the status register.
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