DP8390 NSC [National Semiconductor], DP8390 Datasheet - Page 42

• Manufacturer Part Number: DP8390
• Description: NIC Network Interface Controller
• Manufacturer: NSC [National Semiconductor]

15 0 Switching Characteristics
Note 1 Assumes ADS0 is high when RA0–3 changing
Note 2 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
Symbol
rsws
rswh
rwds
rwdh
wackl
wackh
ww
Register Select to Write Setup
(Note 1)
Register Select Hold from Write
Register Write Data Setup
Register Write Data Hold
Write Low to ACK Low
(Note 2)
Write High to ACK High
Write Width from ACK
Parameter
Register Write (Non Latched ADS0
(Continued)
42
Min
15
20
21
50
0
e
1)
n bcyc
Max
30
a
30
TL F 8582– 79
Units
ns
ns
ns
ns
ns
ns
ns