參數(shù)資料
型號: LM12458CIVF/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 模擬信號調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 14/36頁
文件大?。?/td> 1195K
代理商: LM12458CIVF/NOPB
Timing Diagrams V
A+=VD+=+5V,tR =tF = 3 ns, CL = 100 pF for the INT, DMARQ, D0–D15
outputs. (Continued)
8: RD pulse width
9: RD high to next RD or WR low
11: WR pulse width
13: WR high to next WR or RD low
14: Data valid to WR high set-up time
15: Data valid to WR high hold time
16: RD low to data bus out of TRI-STATE
17: RD high to TRI-STATE
18: RD low to data valid (access time)
19: Address invalid from RD or WR high (hold time)
20: CS low or address valid to RD low
21: CS low or address valid to WR low
V
A+=VD+=+5V,tR =tF = 3 ns, CL = 100 pF for the INT,
DMARQ, D0–D15 outputs.
22: INT high from RD low
23: DMARQ low from RD low
01126417
FIGURE 11. Non-Multiplexed Data Bus (ALE = 1)
01126418
FIGURE 12. Interrupt and DMARQ
LM12454/LM12458/LM12H458
www.national.com
21
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