dp83902a National Semiconductor Corporation, dp83902a Datasheet - Page 55

• Manufacturer Part Number: dp83902a
• Description: St-nictm Serial Network Interface Controller For Twisted Pair
• Manufacturer: National Semiconductor Corporation

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 ST-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
AC Specs DP83902A Note All Timing is Preliminary (Continued)
55
Min
15
20
21
50
0
e
1)
n bcyc
Max
30
a
30
TL F 11157 – 36
Units
ns
ns
ns
ns
ns
ns
ns