lrs1338a Sharp Microelectronics of the Americas, lrs1338a Datasheet - Page 33

• Manufacturer Part Number: lrs1338a
• Description: Stacked Chip Flash Memory Sram
• Manufacturer: Sharp Microelectronics of the Americas

Stacked Chip (8M Flash & 2M SRAM)
Data Sheet
NOTES:
1. A write occurs during the overlap of a LOW CE and a LOW WE.
2. t
3. t
4. t
5. During this period, I/O pins are in the output state, therefore the input signals of
6. If CE goes LOW simultaneously with WE going LOW or after WE going LOW,
7. If CE goes HIGH simultaneously with WE going HIGH or before WE going HIGH,
t
in case a write ends at CE or WE going HIGH.
opposite phase to the outputs must not be applied.
A write begins at the latest transition among CE going LOW and WE going LOW.
A write ends at the earliest transition among CE going HIGH and WE going HIGH.
the outputs remain in HIGH impedance state.
the outputs remain in HIGH impedance state.
WP
CW
AS
WR
is measured from the beginning of write to the end of write.
is measured from the address valid to the beginning of write.
is measured from the later of CE going LOW to the end of write.
is measured from the end of write to the address change. t
ADDRESS
D
WE
OE
OUT
D
CE
IN
Figure 18. Write Cycle Timing Diagram (OE Controlled)
(NOTE 6)
(NOTE 3)
t
AS
t
OHZ
WR
t
applies
AW
(NOTE 5)
t
WC
(NOTE 2)
t
CWP
(NOTE 1)
t
WP
t
DW
Data Valid
(NOTE 4)
(NOTE 4)
t
t
WR
WR
t
DH
LRS1338A
1338A-18
33