參數(shù)資料
型號: 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): 40/56頁
文件大小: 689K
代理商: NS32490D
15.0 Switching Characteristics
(Continued)
Register Read (Non Latched, ADS0
e
1)
TL/F/8582–77
Symbol
Parameter
Min
Max
Units
rsrs
Register Select to Read Setup
(Notes 1, 3)
10
ns
rsrh
Register Select Hold from Read
0
ns
ackdv
ACK Low to Valid Data
55
ns
rdz
Read Strobe to Data TRI-STATE
(Note 2)
15
70
ns
rackl
Read Strobe to ACK Low (Note 3)
n
*
bcyc
a
30
ns
rackh
Read Strobe to ACK High
30
ns
Note 1:
rsrs includes flow-through time of latch.
Note 2:
These limits include the RC delay inherent in our test method. These signals typically turn off within 15 ns enabling other devices to drive these lines with
no contention.
Note 3:
CS may be asserted before or after RA0–3, and SRD, since address decode begins when ACK is asserted. If CS is asserted after RA0-3, and SRD, rack1
is referenced from falling edge of CS.
40
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