LH28F320BFHG Просмотр технического описания (PDF) - Sharp Electronics
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LH28F320BFHG Datasheet PDF : 37 Pages
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A-3 STATUS REGISTER READ OPERATIONS
If AC timing for reading the status register described in specifications is not satisfied, a system processor can check the
status register bit SR.15 instead of SR.7 to determine when the erase or program operation has been completed.
Table A-3-1. Status Register Definition (SR.15 and SR.7)
NOTES:
SR.15 = WRITE STATE MACHINE STATUS: (DQ15)
1 = Ready in All Partitions
0 = Busy in Any Partition
SR.7 = WRITE STATE MACHINE STATUS
FOR EACH PARTITION: (DQ7)
1 = Ready in the Addressed Partition
0 = Busy in the Addressed Partition
SR.15 indicates the status of WSM (Write State
Machine). If SR.15="0", erase or program operation is in
progress in any partition.
SR.7 indicates the status of the partition. If SR.7="0",
erase or program operation is in progress in the addressed
partition. Even if the SR.7 is "1", the WSM may be
occupied by the other partition.
Address (A) VIH
VIL
VIH
CE# (E)
VIL
VIH
WE# (W)
VIL
DQ15-0
(D/Q)
VIH
VIL
(
SR.15
Partition
0
)
(R)
"1"
"0"
(
SR.7
Partition
0
)
(R)
"1"
"0"
(
SR.15
Partition
1
)
(R)
"1"
"0"
(
SR.7
Partition
1
)
(R)
"1"
"0"
(
SR.15
Partition
2
)
(R)
"1"
"0"
(
SR.7
Partition
2
)
(R)
"1"
"0"
(
SR.15
Partition
3
)
(R)
"1"
"0"
(
SR.7
Partition
3
)
(R)
"1"
"0"
Operation to Partition 0
VALID ADDRESS
within PARTITION 0
VALID
COMMAND
tWHR0 (tEHR0)
Operation to Partition 2
VALID ADDRESS
within PARTITION 2
VALID
COMMAND
tWHR0 (tEHR0)
PARTITION3 PARTITION2 PARTITION1 PARTITION0
Check SR.15 instead of
SR.7 in Partition 0
Check SR.15 instead of
SR.7 in Partition 2
Figure A-3-1. Example of Checking the Status Register
(In this example, the device contains four partitions.)
021211
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