am79c972b Advanced Micro Devices, am79c972b Datasheet - Page 48
am79c972b
Manufacturer Part Number
am79c972b
Description
Pcnet?-fast+ Enhanced 10/100 Mbps Pci Ethernet Controller With Onnow Support
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C972B.pdf
(130 pages)
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48
DEVSEL
FRAME
TRDY
C/BE
IRDY
REQ
GNT
PAR
CLK
AD
Figure 27. Descriptor Ring Write In Non-Burst Mode
1
DEVSEL is sampled
DEVSEL
FRAME
Figure 28. Descriptor Ring Write In Burst Mode
TRDY
C/BE
IRDY
REQ
GNT
PAR
CLK
AD
2
1
0111
MD2
DEVSEL is sampled
3
2
PAR
4
0000
0110
MD2
Am79C972
3
DATA
5
PAR
PAR
4
0000
6
DATA
5
0111
MD1
7
PAR
6
0011
PAR
DATA
8
0011
7
DATA
PAR
9
PAR
8
10
21485C-31
21485C-30
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