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AM79C970 Datasheet(PDF) 23 Page - Advanced Micro Devices

Part # AM79C970
Description  PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
PDF  168 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C970 Datasheet(HTML) 23 Page - Advanced Micro Devices

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AMD
P R E L I M I N A R Y
1-890
Am79C970
Figure 3 shows two non-burst read access within one ar-
bitration cycle. The PCnet-PCI controller will drop
FRAME between two consecutive non-burst read cy-
cles. The PCnet-PCI controller will re-request the bus
right again if it is preempted before starting the second
access. The example below also shows a target that can
respond to the PCnet-PCI controller read cycles without
wait states.
18220C-5
FRAME
CLK
AD
IRDY
TRDY
C/
BE
DEVSEL
REQ
GNT
12345678
ADDR
0000
0110
11
10
9
PAR
PAR
PAR
DATA
ADDR
DATA
0000
0110
PAR
PAR
DEVSEL is sampled by the PCnet-PCI controller.
Figure 3. Non-Burst Read Cycles Without Wait States



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