參數(shù)資料
型號(hào): NS32490D
廠商: National Semiconductor Corporation
英文描述: NIC Network Interface Controller(NIC網(wǎng)絡(luò)接口控制器)
中文描述: NIC網(wǎng)絡(luò)接口控制器(NIC網(wǎng)絡(luò)接口控制器)
文件頁數(shù): 41/56頁
文件大?。?/td> 689K
代理商: NS32490D
15.0 Switching Characteristics
(Continued)
Register Write (Latched Using ADS0)
TL/F/8582–78
Symbol
Parameter
Min
Max
Units
rss
Register Select Setup to ADS0 Low
10
ns
rsh
Register Select Hold from ADS0 Low
17
ns
aswi
Address Strobe Width In
15
ns
rwds
Register Write Data Setup
20
ns
rwdh
Register Write Data Hold
21
ns
ww
Write Strobe Width from ACK
50
ns
wackh
Write Strobe High to ACK High
30
ns
wackl
Write Low to ACK Low (Notes 1, 2)
n
*
bcyc
a
30
ns
rswsl
Register Select to Write Strobe Low
10
ns
Note 1:
ACK is not generated until CS and SWR are low and the NIC has synchronized to the register access. In Dual Bus Systems additional cycles will be used
for a local DMA or Remote DMA to complete.
Note 2:
CS may be asserted before or after SWR. If CS is asserted after SWR, wackl is referenced from falling edge of CS.
41
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