參數(shù)資料
型號(hào)： UPD4482321GF-A65-A
元件分類： SRAM
英文描述： 256K X 32 CACHE SRAM, 6.5 ns, PQFP100
封裝： 14 X 20 MM, PLASTIC, LQFP-100
文件頁(yè)數(shù)： 2/28頁(yè)
文件大?。?/td> 370K
代理商： UPD4482321GF-A65-A
10
PD4482161, 4482181, 4482321, 4482361
Data Sheet M14521EJ3V0DS
Asynchronous Truth Table
Operation
/G
I/O
Read Cycle
L
Dout
Read Cycle
H
High-Z
Write Cycle
×
High-Z, Din
Deselected
×
High-Z
Remark
× : don’t care
Synchronous Truth Table
Operation
/CE
CE2
/CE2
/AP
/AC
/ADV
/WRITE
CLK
Address
Deselected
Note
H
×××
L
××
L
→ H
None
Deselected
Note
LL
×
L
××
×
L
→ H
None
Deselected
Note
L
×
HL
××
×
L
→ H
None
Deselected
Note
LL
×
HL
××
L
→ H
None
Deselected
Note
L
×
HH
L
××
L
→ H
None
Read Cycle / Begin Burst
L
H
L
××
×
L
→ H
External
Read Cycle / Begin Burst
L
H
L
H
L
×
HL
→ H
External
Read Cycle / Continue Burst
×××
HH
L
H
L
→ HNext
Read Cycle / Continue Burst
H
×××
HL
H
L
→ HNext
Read Cycle / Suspend Burst
×××
HH
H
L
→ H
Current
Read Cycle / Suspend Burst
H
×××
HH
H
L
→ H
Current
Write Cycle / Begin Burst
L
H
L
H
L
×
LL
→ H
External
Write Cycle / Continue Burst
×××
HH
L
→ HNext
Write Cycle / Continue Burst
H
×××
HL
L
→ HNext
Write Cycle / Suspend Burst
×××
HH
H
L
→ H
Current
Write Cycle / Suspend Burst
H
×××
HH
L
→ H
Current
Note Deselect status is held until new “Begin Burst” entry.
Remarks 1.
× : don’t care
2. /WRITE = L means any one or more byte write enables (/BW1, /BW2, /BW3 or /BW4) and /BWE are LOW
or /GW is LOW.
/WRITE = H means the following two cases.
(1) /BWE and /GW are HIGH.
(2) /BW1 to /BW4 and /GW are HIGH, and /BWE is LOW.
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