LH28F640BFHE-PTTL80 Sharp Electronics, LH28F640BFHE-PTTL80 Datasheet - Page 36

• Manufacturer Part Number: LH28F640BFHE-PTTL80
• Manufacturer: Sharp Electronics

Specifications of LH28F640BFHE-PTTL80

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 80ns
• Interface Type: Parallel
• Boot Type: Top
• Address Bus: 22b
• Operating Supply Voltage (typ): 3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 16b
• Number Of Words: 4M
• Supply Current: 25mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

A-3 STATUS REGISTER READ OPERATIONS
status register bit SR.15 instead of SR.7 to determine when the erase or program operation has been completed.
If AC timing for reading the status register described in specifications is not satisfied, a system processor can check the
SR.15 = WRITE STATE MACHINE STATUS: (DQ
SR.7 = WRITE STATE MACHINE STATUS
( Partition 0 )
( Partition 0 )
( Partition 1 )
( Partition 1 )
( Partition 2 )
( Partition 2 )
( Partition 3 )
( Partition 3 )
1 = Ready in All Partitions
0 = Busy in Any Partition
1 = Ready in the Addressed Partition
0 = Busy in the Addressed Partition
SR.15
SR.15
SR.15
SR.15
DQ
SR.7
SR.7
SR.7
SR.7
FOR EACH PARTITION: (DQ
Address
WE#
15-0
CE#
(D/Q)
(R)
(R)
(R)
(R)
(R)
(R)
(R)
(R)
(W)
(A)
(E)
Check SR.15 instead of
SR.7 in Partition 0
V
V
V
V
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
V
V
V
V
IH
IH
IH
IH
IL
IL
IL
IL
within PARTITION 0
VALID ADDRESS
Table A-3-1. Status Register Definition (SR.15 and SR.7)
Figure A-3-1. Example of Checking the Status Register
COMMAND
(In this example, the device contains four partitions.)
Operation to Partition 0
VALID
7
)
PARTITION3
t
WHR0
(t
15
EHR0
)
)
PARTITION2
Machine). If SR.15="0", erase or program operation is in
progress in any partition.
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.
SR.15 indicates the status of WSM (Write State
SR.7 indicates the status of the partition. If SR.7="0",
PARTITION1
within PARTITION 2
VALID ADDRESS
COMMAND
PARTITION0
Operation to Partition 2
VALID
NOTES:
t
WHR0
Check SR.15 instead of
SR.7 in Partition 2
(t
EHR0
)
021211
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