dp83901a National Semiconductor Corporation, dp83901a Datasheet - Page 51

• Manufacturer Part Number: dp83901a
• Description: Serial Network Interface Controller
• 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 SNIC 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 DP83901A Note All Timing is Preliminary (Continued)
51
Min
15
20
21
50
0
e
1)
n bcyc
Max
30
a
30
TL F 10469 – 35
Units
ns
ns
ns
ns
ns
ns
ns