MB82DBS08164C-70L Datasheet, PDF (15/58 Pages) Fujitsu Component Limited. – 128 M Bit (8 M word×16 bit) Mobile Phone Application Specific Memory

MB82DBS08164C-70L
• Burst Read Suspend
Burst read operation can be suspended by OE High pulse. During burst read operation, OE brought to High
from Low suspends the burst read operation. Once OE is brought to High with the specified setup time against
clock where the data being suspended, the device internal counter is suspended, and the data output becomes
high impedance after specified time duration. It is inhibited to suspend the first data output at the beginning of
burst read.
OE brought to Low from High resumes the burst read operation. Once OE is brought to Low, data output becomes
valid after specified time duration, and the internal address counter is reactivated. The last data output being
suspended as the result of OE = H and first data output as the result of OE = L are from the same address.
In order to guarantee to output last data before suspension and first data after resumption, the specified minimum
value of OE = L hold time and setup time against clock edge must be satisfied respectively.
CLK
OE
tCKOH tOSCK
tCKOH tOSCK
DQ
WAIT
tAC
Q1
tOHZ
Q2
tCKTV
tCKQX
tAC
tAC
tAC
Q2
Q3
Q4
tOLZ
tCKQX tCKQX
• Burst Write Suspend
Burst write operation can be suspended by WE High pulse. During burst write operation, WE brought to High
from Low suspends the burst write operation. Once WE is brought to High with the specified setup time against
clock where the data being suspended, the device internal counter is suspended, data input is ignored. It is
inhibited to suspend the first data input at the beginning of burst write.
WE brought to Low from High resumes the burst write operations. Once WE is brought to Low, data input becomes
valid after specified time duration, and the internal address counter is reactivated. The write address of the cycle
where data being suspended and the first write address as the result of WE = L are the same address.
In order to guarantee to latch the last data input before suspension and first data input after resumption, the
specified minimum value of WE = L hold time and setup time against clock edge must be satisfied respectively.
Burst write suspend function is available when the device is operating in WE level controlled burst write only.
CLK
WE
DQ
WAIT
tCKWH tWSCK
tDSCK
D1
D2
High
tDHCK
tCKWH tWSCK
tDSCK tDSCK tDSCK
D2
D3
D4
tDHCK tDHCK
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