am79c970 Advanced Micro Devices, am79c970 Datasheet - Page 23

• Manufacturer Part Number: am79c970
• Description: Pcnettm-pci Single-chip Ethernet Controller For Pci Local Bus
• Manufacturer: Advanced Micro Devices

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
1-890
DEVSEL
FRAME
AMD
TRDY
IRDY
C/BE
REQ
GNT
CLK
PAR
AD
1
DEVSEL is sampled by the PCnet-PCI controller.
2
Figure 3. Non-Burst Read Cycles Without Wait States
3
ADDR
0110
4
P R E L I M I N A R Y
PAR
5
0000
Am79C970
DATA
6
access. The example below also shows a target that can
respond to the PCnet-PCI controller read cycles without
wait states.
PAR
7
ADDR
0110
8
PAR
9
0000
DATA
10
PAR
11
18220C-5