LRS1341 Sharp, LRS1341 Datasheet - Page 18

• Manufacturer Part Number: LRS1341
• Description: Stacked Chip 16M Flash Memory and 2M SRAM
• Manufacturer: Sharp

LRS1341/LRS1342
18
NOTES:
1. A write occurs during the overlap of a LOW S-CE
2. t
3. t
4. t
5. t
6. During this period, DQ pins are in the output state, therefore the input signals of
7. If S-CE
8. If S-CE
and S-WE going LOW. A write ends at the earliest transition among S-CE
S-CE
write to the end of write.
opposite phase to the outputs must not be applied.
A write begins at the latest transition among S-CE
of write.
after S-WE going LOW, the outputs remain in HIGH impedance state.
S-WE going HIGH, the outputs remain in HIGH impedance state.
CW
BW
AS
WR
is measured from the address valid to the beginning of write.
is measured from the time of going LOW S-UB or LOW S-LB to the end of write.
is measured from the later of S-CE
is measured from the end of write to the address change.
2
S-UB, S-LB
ADDRESS
going LOW and S-WE going HIGH. t
1
1
goes LOW or S-CE
goes HIGH or S-CE
S-CE
S-CE
S-WE
D
OUT
D
IN
1
2
Figure 10. Write Cycle Timing Diagram (S-WE Controlled)
2
2
goes HIGH simultaneously with S-WE going LOW or
goes LOW simultaneously with S-WE going HIGH or
1
going LOW or S-CE
(NOTE 4)
WP
t
AS
is measured from the beginning of
1
, a HIGH S-CE
1
going LOW, S-CE
2
going HIGH to the end
2
t
t
AW
and a LOW S-WE.
WZ
2
(NOTE 6)
going HIGH
t
WC
(NOTE 2)
1
(NOTE 3)
going HIGH,
t
t
(NOTE 7)
CW
BW
t
WP
Stacked Chip (16M Flash & 2M SRAM)
t
DW
Data Valid
(NOTE 5)
t
WR
t
WR
(NOTE 8)
t
DH
t
OW
Data Sheet
LRS1342-9